I agree with the others on pronunciation and speaking. I had a boyfriend who spent a couple of years learning French on his own. His reading comprehension and understanding of the grammar rules were quite good but I couldn’t understand him when he spoke. He always thought I was just being a jerk and was jealous because I took formal lessons. Anyway, we went to France and NO ONE could understand him.

Yes, it's possible to learn, trust me. Even, without leaving your home country. You need the right motivation and method. Here you have two posts I wrote about this subject Some resources to learn French: https://www.italki.com/discussion/193798 How to learn a language in 2019: https://classic.italki.com/notebook/4183033/entry/961908

My bit of advice: There are four different aspects of language learning: reading, writing, listening and speech. You can learn the passive (reading and listening) on your own. That requires consistent daily practice using a variety of methods (apps, youtube, podcasts, articles, etc). Even a minimum of 10 minutes can count as a daily effort, but you must be relentlessly consistent. For writing and speaking (active language use) you really do need help, as Derrick points out. You are interested in speaking - and to succeed here you must have a language partner or something like an iTalki tutor. It takes practice to overcome shyness in speaking and, as you point out, to learn correct pronunciation. Talking along with videos, imitating the words and sounds, will help, but ultimately you need the human feedback in real time. Remember: The keys to success are consistent daily effort, using a variety of methods, and speech practice with a partner. You can do it! Good luck!

doesn't matter how you learn it, what matters is that you're able to retain what u learn . To be understood by french ppl, you'll need SOMEONE else to check your pronunciation. A teacher, french partner, french speaking friend, doesn't matter. ...but for best result, you need teacher or classroom.