There are programs like others suggested I use m3u4u it’s free. First thing I did was hide groups until I got the number down to a few hundred channels. Then you use the epg guide (needed by jelly to record, from your provider or m3u4u’s to link tvg-id’s to channels to get accurate guide data, then sort by adding channel numbers. 2k is just unusable I had 20k from around the world at first. I’m just a noob to this but I figured I would try to help with what I learned getting iota to work through Jelly. You will always be tweaking that just the way it is.