I think it will be good to have an algorithms and datastructures cource in the list of cources available in sololearn.

Answer 1

#Sololearn app and course are in progress mode and not comoleted yet,
in this reason waite for new versions and new updates!!

Answer 2

You've already taken an algorithms course. You've taken several of them. They were just cleverly disguised under names like "Mathematics" and "Algebra". Algorithms are math, plain and simple. Study up on logarithms, functions, discrete, set theory, logic, etc.