Play a closed system by this I mean try to keep closed the pawn structure or play c4 and forget about all the e4 theory because its extremely demanding, its a tip and a guess so I can not back it with my own experience.
Positional chess its what I recommend for a player like yourself as open games have a lot of lines and forced sequences.
But I said c4 as white and as black what can I say just reply and hope for the best, given all the advancements of computer chess I think Caro-kann its a solid opening and It might be not as drawish as We think, It was used by
Karpov.
I play for fun but if someday I wanted to compete fide for example I would select a system such as the english opening and the Caro-kann and train myself in that task,
since today my mind is not able to keep fortitude
against this three together e4 e5, ( the double pawn
I think its called) e4 c5 ( the sicilian) plus the french.
I do not have enough discipline to improve as a e4 player and you need a lot as Its very easy to get carried away
with the myriad of positions or a guide, hire a coach if you have the chance a good one as I think you are very good already,
@Anna-S-Fuchs .