Conventional gear will or will not make you a good pilot: that is, it will, and it will not.
What it won't do is instill judgement or common sense, both of which are necessary regardless of what undercarriage rests beneath. A conventional gear airplane matters during taxi and briefly during a transition on landing...otherwise it really makes no difference.
You used the word "cheap," which is the rating of quality. Avoid cheap airplanes. Fly inexpensive ones all you can. There's a big difference.
Flying conventional gear isn't a superhuman feat. It can prove a bit less forgiving of poor technique or error, but there's far too much legend and lore flying about and too little truth. Tricycle gear tends to permit laziness, whereas conventional gear requires you to stay with the airplane throughout the landing and ground operation, instead of leaving the cockpit for a sailboat in the Bahamas, the moment the mains touch down.
A taildragger has no tailwheel; it has a skid. Conventional gear uses a tailwheel.
Why slipstream effects to tail wheel plane?