Jumping into Data Science on tight budget : Career advice and Portfolio

Hello

I am trying to jump into Data Science by learning following things

1\] Any python course with certificate

2\] Any R course with certificate

3\] Excel Skills upgrade

What else free things I can learn to improve my profile ?

How can build and present my portfolio on Data science projects ?? What should I include ?

What are other resources and certification I can do for cheap or free?

How should I market myself to recruiters?

advice budget career career advice data data science datascience portfolio science