FIRST RECOMMENDATION - take the free, online introductory video offered by MathWorks. An estimate is that this tutorial takes approximately two hours to finish; however, you can complete the tutorial over multiple sessions at your convenience (your progress is tracked).
To "launch" the tutorial (link below) you will be required to use your MathWorks account credentials.
MATLAB zyBook. This is an online text on MATLAB use with instruction on MATLAB programming. There is $0 cost [introductory offer permitted by zyBooks]. While there is $0 cost for this semester, in order to access the text ,Michael O'Connor will only send the access code to students who commit to giving feedback on the text [it is being considered for use in Spring Semester]. If you are interested in the text and willing to give short write-up at the end of this semester then send me (Michael O'Connor) email