PlebDevs Beginner Backend Series
https://www.youtube.com/playlist?list=PL22m-Ibz1G_SLyIXN06T2hR-RR1cU-mX7
In cased you missed it the legend Damian (aka gudnuf) started a short beginners backend series using TypeScript.
The first two lessons are out now but keep an eye out for the rest to release over the next few weeks!