While we always recommend to seek out for professional help when needed, you can absolutely practice some techniques while you are searching for a therapist!
There are many workbooks out there focused on incorporating therapy techniques into your daily life routine. Cognitive Behavioral Therapy is the most popular and most widely used therapy technique, due to the mass amount of data behind it.
Practicing CBT at home can improve your mental health and it’s pretty easy to grasp the concept behind it! You can purchase books on this topic via Amazon, Audible, and Kindle.