there's nothing wrong with tabs, because you're gonna have to strengthen up your hands for a while before you can casually play most things. it's a good idea to learn theory from the piano, in my experience with learners.

early guitar players generally have a hard time with the strength and dexterity that are required from your fretting hand. you can't shortcut that. you have to just play a lot. it is by far the hardest part of picking up the instrument for many folks regardless of age/size/knowledge. eventually you are gonna want to be able to put any finger on any fret, so that you can do what you want. there's nothing wrong with non-musically Playing Notes to build up awareness and stamina.

it's not clear from your post whether you should be playing a right or left handed guitar.. nobody can really help you fix that issue if you have made a mistake haha..

source: am a 22 year player who started with tabs alongside taking piano lessons, also privately taught both young and old beginners for several years