Absolutely laughable! No, I'm not talking about your model. I'm talking about MY first attempt at model building! LOL! Yours, on the other hand, turned out looking great and it's definitely something to place on your shelf with pride which is quite the opposite of how my first model turned out.
There are LOTS of good advice going on here. Regarding the paints, I use Model Master enamels mainly because, in my town, there's no shortage of it. Hobby Lobby is a good source. You're exactly right in that paints can be expensive. I like Hobby Lobby because of their 40% off coupon. Heck, I'll pick up one bottle of paint at a time if I can save 40% on each one.
I'm 45 years old and I've been building models non-stop since I was 7 years old. Even though I've been at it for 38 years, I'm STILL learning tips and tricks thanks to this forum. Painting aircraft wheels & tires has always been a thorn in my side until I started using a trick I learned hear a month or two ago. This works out great if the wheel hub and the tire are all one piece and not separate. First I'll paint the hub. After that has dried, I'll then go on to paint the tire. I'll take my paint and thin it down so that it's about 50/50 paint and thinner. It should be pretty watery. I'll then take a thin pointy brush, dip it in the thinned paint, then touch the tip of the brush where the tire meets the hub. The paint will just flow in thanks to capilary action. Do this a few times going around the hub until the entire hub/tire joint is filled with your thinned paint. This will give you a nice, sharp demarcation line of paint. After that has dried, you can then go back and paint your tire without having to worry about getting too close to the hub. I've only just started using this technique and it's made my landing gear look so much better!
Also, if you find yourself at Walmart or some home improvement store, pick up a roll of blue painter's tape. It's pretty low-tack which means it won't strip your paint off if you're masking off areas. I use the narrow roll (maybe 1" thick?) as opposed to the wide roll. Once you have that, you'll be able to mask off areas like the leading edge yellow I.D. bands often found on the British planes. By using the tape to mask of the area you're about to paint, you'll get nice sharp edges.
Congrats on your first build and I can't wait to see more of your kits in the future. Keep 'em coming!
Eric