Loads of good resources from TR themselves and on this forum on these topics so you are in luck!
Recent TR podcast: Strength Training, KOM Training Guide, Training Fatigue and More – Ask a Cycling Coach 341 - YouTube which is due to be followed with a more detailed podcast this week which will cover practical suggestions on how to best fit strength training into your plan: Strength Exercises for Cyclists, High Volume, Goal Setting and More – Ask a Cycling Coach 345
TR strength training guidelines and link to weight calculator is also useful: Coach Chad's Strength Training Benchmarks for Cyclists - TrainerRoad Blog
Good thread discussing peoples different approaches: Strength Training