I'm far from claiming expertise in the field. But I'd start with the UCSD Bioinformatics Specialization course

https://www.coursera.org/learn/bioinformatics

The Biostar Handbook and BioPython library also have active communities for self learners

https://www.biostarhandbook.com/

http://biopython.org/DIST/docs/tutorial/Tutorial.html

Best of luck ;)