I love your lines and your style. They are clear, clean, exaggerating muscle physiology quite a bit, but with beautiful curves.
The problem with giving you advice is, that where you are makes sense. There are other places you could be, but they would not be clearly superior, just different. So sadly, the burden of finding your way through art space stays squarely with you.
You could start playing some more games to challenge you:
You could go for less details and bigger shapes, to see if you can reduce the number of lines and get towards more graphical elegance via a lower line count.
You could focus more on construction, to get from drawing from observation more towards drawing from imagination by manipulating point of view or finetuning poses.
You could pick a specific artist you like and try to imitate their style....
Those are just suggestions for games you could play. About what you should do.... meh, if I knew that.... maybe prepare for an actual finished piece, one you put a frame around and present it to others.... so you get a better idea about specific roadblocks between where you are now, and where you want to be.