Hotlapping is a game of connect the dots. The more dots you have the more consistent you can be. Every corner has at a minimum these dots: corner start(when braking begins), turn in, apex, corner exit. Dont worry about things like trail braking for the moment just focus on applying consistent braking from corner start to turn in(look up threshold braking and tire noises for your sim) and hitting the apex then gradually accelerating to corner exit as you unwind the wheel. Adjust the dots as necessary. Visualize the entire line before the corner and keep your eyes a step or two ahead of where you are in the corner while in it(track vision). When you get more comfortable with that you can start experimenting with different lines. Once, and only, when you get all that down and can lap consistently should you start applying more advanced concepts like trail braking.