Answer 1

1. A rough grip of what it actually is:
https://en.wikipedia.org/wiki/Bioinformatics

2. A few resource for initializing a foundation:

What is a bioinformatican:
http://blog.fejes.ca/?p=2418

Bioinformatics curriculum guidelines
(open-access):
https://doi.org/10.1371/journal.pcbi.1003496

3. A sample curriculum:

Introduction to Biology
Principles to Chemistry
CS - PYTHON
Principles of Computing
Calculus
Mathematics for CS

Biochemistry
Organic Chemistry
CS - OO Java
Introduction to Databases
Linear Algebra
Introduction to Linux
Descriptive Statistics

Genetics
Algorithmic Thinking
Probability
Cell Biology
Differential Equations
Biostatistics

Data Science
Inferential Statistics
Molecular Biology

4. Courses on Coursera:
https://www.coursera.org/learn/dna-analysis
https://www.coursera.org/learn/genome-sequencing
https://www.coursera.org/learn/
https://www.coursera.org/learn/comparing-genomes
https://www.coursera.org/learn/molecular-evolution
https://www.coursera.org/learn/genomic-data
https://www.coursera.org/learn/dna-mutations
https://www.coursera.org/learn/bioinformatics-project

Also,
Machine Learning, Deep Learning, Data Science, Sequencing, RNA-Seq, ChIP-Seq, Genomics,...
have their own topic for discussion.