Dear aspirant,

Mathematics is a subject  that can only be mastered by practice. So, if you want to learn mathematics you'll have to practice a lot.

Statistics is a relatively intuitive aspect of mathematics and thus you can master it by practice. If you want to learn the concepts refer to NPTEL courses that offer courses by professors from institutes like IITs, IISc, IISERs.  Learn the concepts and solve as many problems as you can, this will help you internalize the concepts.

Logical reasoning also requires a lot of practice, there is very little theory to it.

Hence, follow courses online and practice regularly.

Hope this helps.