New Game creator but never learned prier but for RPG making

I am trying to learn how to create games myself but I have never had any pier knowledge about it. I have a few great ideas for RPG/ Platformers/ dungeons for a mixture of audiences (adult & children) however the few that I have looked at either requires a few hundred dollars to start it or the graphics sucks so bad the whole idea couldn’t be done just due to the crappy graphics. However also not only is the graphics garbage so is there tutorials on how to create the games through there services for RPGs. I would also like to know which version of unrealengine would be perfect to distribute my game without really costing me too much since I plan on distributing it through various sites online and really only making money from those sites for the games I create.