How do l get rid of tiny white flies on my Basil plant...

Soap water generally helps with this!

Aphids. Ate my full garden. Only way is using strong spray with force on and under the leaves. They’ll multiply crazy fast.

Yes, usually the home remedy for that is to spray it regularly with sopewater. Both from the top but especially below, on the back of the leaves.

Get some detergent and clean, like it was dishes