This is a great post on getting more space out of your closet.
Huggable Hangers or something similar. Tier hanging or double rods. Pants on multiple pant hangers. Tank tops can be hung multiples on one hanger.
We went to Home Depot and got their closet system that includes shelving, and different ways to hang clothes, etc. It is really very nice and keeps you well organized.
Here is how I did for my little closet.. https://bushraslifestyle.com/how-to-organize-a-small-closet/
I hope it helps! Otherwise send me a picture and I can help you to put a plan together for free.