Being a Captain has very little to do with actual stick and rudder skills. Assuming you can do a decent job of flying the aircraft and passing the sim/line checks you will be fine from that point of view. A lot of command stuff is about managing things when they go wrong. The sort of stuff that crops up where you have never had any training in how to deal with it. The "Black Swan" type of events. Any Captain with a few years in the LHS could share some stories with you. Learn from them, put yourself in their shoes.
If you like it where you are, stay put. Does it work for you and your family? No flying job is perfect.