Just as FW says re uses of yarn plus thickness.
If you join your local Weavers, Spinners and Dyers guild, you may find someone there who could lend you a drum carder or even who might be selling one.
Personally I have decided I will have to save up for a classic carder
I also got back into knitting (ie I knew how to do it, but didn't) because of spinning and am now hooked on that too.... so much to do, so little time
Second all that.
Our Guild has a drum carder it can lend out, recent discussions on Ravelry about drum carders always come down emphatically on the side of Classic Carders.
Like jaykay, I got back into knitting (could but didn't) because I wanted to use what I spun, and now I am totally hooked on making my own clothes with my own homespun
Even with extremely basic knitting skills, you can very easily make things which are seriously useful to smallholding / outdoorsy types - scarves, wrist warmers, tube socks that fit anyone, for instance.
And once you have joined a spinning / knitting / crocheting / fibre group, you will never be short of people very willing to help you with anything that you are struggling with and happy to show you techniques you haven't come across.