Great for you, the coins and currency you have are a great start, beginner or long time colletor no ones is going to laugh at you. Who knows with the euro now out your coins may be worth alot someday. I collect what I like, I do have some investment coins, gold mostly, but most of what i have is because of the history of the coins, I have some coins from the 1860's and like to think of who may have had that coin during the civil war. Also the coins are like a memory of the countrys you have been to, enjoy them. I will be going to Scotland and Ireland next year and will be getting some coins from there to remember the trip.

I used to collect a little more seriously, but even when I was actually buying coins, I wasn't spending lots of money. I would buy an occasional coin because I liked it and could afford it, or I'd go through the local dealer's "junk foreign" box, and find some interesting older coins and add a few that were pretty or from countries I didn't have. Historical interest counts for me as much as rarity, and there are some historically interesting coins which are rather inexpensive.

These days, I'm limited mostly to collecting new state quarters as I receive them, and anything interesting which crosses my pocket. Though I did add a few Colombian coins and notes when I visited recently.