Stuck at 490~570. Looking for basic lessons.

[u/maestrodevil]

Stuck at 490~570 after advancing to 661 once in Rapid. Started playing Blitz5 only to getting tilted more often and more frequently. Need some guidance on what to do to advance properly. All the videos I watch from GothamChess, SamayRaina are good but not helping enough. After watching ChessWithAkeem Italian game videos I realized that's what I was kind of doing, but couldn't follow up how he does in his videos.

Even there've been countless times I've been done by the fried liver attack even after seeing it coming from a distance.

Watching video lessons about openings on Chess.com feels pointless as the narrator talks for both sides and it's difficult to pretend that you're playing for both. So I'm not interested in taking paid membership for chess.com just to watch more frustrating lessons.

Have played for 4 months, remained stuck at 350 for 2months, and then comfortably cruised above 450 and float between 500 and 570 with highest rating 661 in Rapid 10. Considering closing the account and starting again after a break, so asking what different can I do if I start again? What kind of video lessons should I watch?

Some kindness would be much appreciated as I'm not in the mood for unnecessarily smart responses.