Hello there,

Conic sections and circles to be honest are actually easy if you can remember all the formulas . Since learning formulas is something which can be done only if you put an effort by yourself. You can paste charts in your room with all the formulas written on it. See it every morning and before sleeping, read them at least once every day.
Use books like cengage, although the image of this book is created as it has one of the toughest questions but if you see it's solved example and concept application questions they are quite easy and are solvable if you just follow their theory exactly. so solve questions from it as being able to solve one question from cengage will automatically boost your confidence in the subject.

and mastering any concept in maths requires a lot of practice so once your confidence gets boosted start trying to solve the exercise questions, make best use of internet and youtube and ask your teachers and focused peers doubts, dont hesitate.

Hope it helps!
ALL THE BEST!