Gopal Bihari Saraswat better first select the best book on econometrics https://economics.ut.ac.ir/documents/3030266/14100645/Jeffrey_M._Wooldridge_Introductory_Econometrics_A_Modern_Approach__2012.pdf
Download this it is easy and helpful.
Secondly, search for lectures as per your requirement. there are plenty of tutorials on youtube, just ned to find your direction first then search and learn.
Remember: Education is an ocean and youtube is the pipeline direct from the ocean, you need to filter the information before use, so use books to filter them and you will be an expert.