You can turn territories into states anywhere in Eurasia, and that will count towards your relative size. Expanding into North Africa and West Africa makes your "homeland" larger and helps keep colonists in line. There are a couple missions that help you pay for the cost of making a core province. Use them.I don't think Portugal is the best newbie start as they got nowhere to expand. Sure you can take Morocco but its the wrong culture and full of Muslims that won't convert so they rebel every 10 minutes without sky-high autonomy, I'm not sure it's worth taking anymore than the 2 provinces in the trade node.
Castile's a nice Allie but he's taking half your trade and your in no position to do anything about it.
Sure you can colonize but then the colonial nations get disloyal because you're so small.
Maybe I just did it all wrong but England seems easier to me.
The more experienced players might just take down Castile and Aragon to make all Iberia into a Portuguese homeland (I'm not experienced to do this often, but sometimes the stars line up and I can take Iberia before colonization starts up.) The newbie can usually take some of North Africa or West Africa instead. It's full of heathens, yes, but you get better conversion strength once you pass admin tech 6 and more at tech 8, more when you take the counter-reformation decision.
If you have the Common Sense DLC you can improve provinces by spending monarch points. Admin points increase tax value, diplo points increase production value, mil points increase manpower. That way you can play as a small country and still control a lot of colonies.What do you mean by that, how can I funnel diplomatic power points into provinces for trade power?
Never reduce your army maintenance, especially at war. This reduces the strength of your army and could explain why you lose battles. It takes three to four months before your armies regain full strength (which is a lot of time to keep running for the hills before you can face them and win). Also, if you reduce army maintenance at peace, you will be harder to fight rebels so keep watch for when they are generated.Also, will Morocco definitely be a problem at the start or did I just have bad luck with them making war on me and treacherous Castilians ditching me? I would like to handle Morocco after I got my budget in shape and can afford a war or two.
If you reduce the maintenance of your navy, your light ships will lose trade power, and have no strength to protect trade (higher trade power = more money).
You can get your army and budget in shape by only buying advisers you can afford in the first decade or two. Once your first regency ends you should have built units to your army force limit. Take a loan or two at that point and start building mercenaries, declare war, and use the mercenaries plus your regular troops to fight Morocco. If they got both Tlemcen and Tunisia as allies, you might want to look at Mali as a target instead. I tend to fight them anyway, but it's tougher when all three are fighting me so I wait until I can pull in Castile on my side.