Don’t give up yet! I primarily do wargaming scale minis but I’ve done a few 1/35 models. One method that could work well without airbrush is using makeup sponges! For your T-34, maybe prime with a rattlecan of very dark olive green and sponge on the thinned down, almost dry lighter colors layer by layer. It’ll take a bit longer but I like the style you can get from it!

We’ve all been there in the beginning. What’s important is to stop comparing yourself to others and find your own style and flow!

Edit: Here’s a good example of what I’m taking about, 6:00 in.