I need some advice... I am playing Holland, I'm in 1579 and conquered all core provinces to form Netherlands except Gelre.
You can do this by 1450 if you're willing to face a coalition; 1460 if you're not. That isn't to say either of those two routes is optimal; since you can't form Netherlands until ADM tech 10 anyway no matter how soon you have the provinces, I prefer to pick them up near/after 1500 and expand in other directions first. But you're definitely a little behind the curve.
I made some mistakes like claiming on them few times now I am allied, I have marital ties, I give them subsidies and but I they refuse to be vassals. Why ? I even hit 200 relations and nothing. What I am doing wrong?
You're not big enough. Try again when you're >600 autonomy-modified development. Diplo-vassalizing is
hard; in most cases you're better off doing it via war. Diplo-vassalizing HRE members is harder still.
Also, as general situation, I made some mistakes. I lost the alliance with Austria when I went Reformed
You shouldn't have needed it that long anyway.
the issue is they have Brabant, Flanders and Walloon which makes them rivals.
It's entirely feasible as Holland to become Emperor and get the BI. This is my preferred route, since while it is
a little cheesy, it makes thematic sense to me; in particular, as a player-controlled Dutch nation, it makes
much more sense than allowing Netherlands to revolt free. You don't actually need to keep Emperor, or play the Imperial game at all, and in fact it's possible to get the BI without it, if you're willing to risk being the RM partner chosen. But being Emperor
and RMed to them allows you to
guarantee the 70% RM chance goes to you, in addition to the 10% Emperor chance.
So I am thinking to start court France.
I keep France over Austria as soon as I'm independent. Literally the only thing I use Austria for is automatic military access through the rest of the Empire in the independence war.
In colonization game I am doing rather well...in Americas I only have Bermudas.
This sentence is a contradiction.
In Africa I am doing great. I have 5 provinces in West Africa
That's
not great.
it is occupied by a rather big African nation
Unless they're up to date in institutions and tech this really shouldn't be an issue.
so I am thinking go India or Indonesia or even try to form an Australian Colony.
Note that India in general is not colonizable, you'll have to take the land from existing nations. Indonesia has some though. Australia is probably your best option, but do you have the range?
Go for Colonial Canada. The rest of Americas is already picked by Spain, Portugal and England
If you're waiting to choose your colonial region(s) until
after you can already see the AI established in adjacent colonial regions, then in perfect honesty you don't even have a shot in the colonial region you've chosen. This is doubly true since you consider 5 + 2 + 1 + whatever to be
good colonization, after having Exploration unlocked (albeit not filled) for a
minimum of 49 years. I'm also
seriously concerned that you consider what little colonization you have done to be economically challenging; you mentioned it caused you to be on the verge of bankruptcy, and for the life of me I
cannot figure out why.
Question: Did you by chance leave your colonist in the colony
each and every time after you established it? You
can recall him, to establish another colony, and the natural growth will (eventually) cause it to grow into a city. In fact, in patch 1.19 (the latest patch), the chance that the colonist himself brings in new settlers is
decreased with each colony level, so it's actually preferable to relocate him at some point, as he can do more good elsewhere.
I would say that your game went very slow (albeit quite good if it was your first game, as it takes a while to learn everything), and it's really only good in the sense that it has taught you things (like not to abandon a PU). You can certainly still finish it, but given that you're absolutely not going to be able to achieve your apparent goal of being a colonizing power, I would seriously consider starting a new one.
Do not let me (or anyone) tell you how to have fun, though.
Finally, what military ideas would you pick with Holland/Netherlands? So far I have Economic, Explorarion and Trade and I think is time to add some military might.
I'm one of those weird players who prefers using my military strategically to actually having one that has good stats, so I'm a bad person to ask this; I pretty much never need a single MIL idea in SP. But the general consensus is that Defensive/Offensive/Quality are all solid (maybe not in that order), and Quantity is more situational. Aristo is generally frowned upon, and you don't mention whether you have access to Pluto yet, but Pluto fits the trade theme you have going on,
and gets you some morale and manpower.
You probably know this already, but unfortunately naval warfare doesn't matter enough in EUIV to justify picking either of the naval idea sets (naval or maritime).