Edit is something like a remix, but not quite so extensive. You can edit a track for example by extending it, shortening it, or as in this case, you could just mash up these 2 tracks together into a single track. Check out Audacity, free software to do this, and If you have money, Check out DDJT courses “Make you own DJ edits” and “Pro mixtape formula”. While all this infomation is also available for free in the internet, these courses are well explained, go to detail, and you’ll be able to do this stuff right away. This will also cover how to get better quality recordings. I just say it involves post-production.
Mixtapes are a DJ’s business card, so Its important in my opinion to plan out the set.Try to find tracks you think go well together, practice and try out different transitions, plan the set so, that he drive of the set is building up, OR goes up and down slightly. This relates to the lenght of the mix: radio show? 1-2 h. Mix to show off your skills? max 30 mins. Thats about as much I listened.
You already record your practices, and thats a very good thing. Now listen to your mixes critically, and you’ll gonna find things that need improving yourself.
Keep Practicing!