I use ''Wondershare Filmora'' to edit my videos on pc and YouCut - Video editor on my android phone. But, again you will need sometimes some editors to reduce the size and I use for that Movavi Video Converter. I also use ''Backgroud eraser'' to create png ( or paint net on pc). Also there are some websites where you can create cool outlines text and those are cooltext.com and ontmeme.com/outline-fonts.

If you need a good photo editor and that's free, I use Paint Net and you get get it for free from getpaint.net. For phone I use ''Photo editor'' and sometimes Snapseed ( from google ).

I also recommend @romafedorov to learn from. He's really good at videography. I learned a lot of things from him !