Here's a good video:
https://www.youtube.com/watch?v=n2KbEQAzuN8
Here's a good website:
https://supcom.fandom.com/wiki/Category:Strategies
There is plenty more where that came from.
If a player can't benefit from things like this, then they are outside of the Mystery of the Infinite War. If they are within the Mystery of the Infinite War, then this won't be enough. Their thirst for victory and their rancor at defeat will be their guide to further improvement.

This guy, The Green Squier [sic] is a great example of good tutorials that are on youboob these days. his link as follows: https://www.youtube.com/watch?v=2c-tUPtIfgs

Here's a good one from the same author:
https://www.youtube.com/watch?v=IzYdv1S5XLk