First of all learn basic topics ....like basics of arrays, strings etc

then basic algorithms like binary search, dfs, sorting, basic dynamic programming

and also solve problems on leetcode to learn basic algorithms

once you are done with basics of everything then solve more and more problems only ..... and implement the things

if you are not able to come up with the solution the see other's code or some video on Youtube

have patience and keep learning. Consistency is very important in CP. GOOD LUCK !