>>20756I have no idea what the pacing is going to be. There are two possible futures:
1) The pacing is sane and they don't skip much. Then UQ Holder won't reach the stage where knowledge of Negima is pretty much required, and will mostly be over while they still establish the new characters. In that case you will miss mostly the numerous background references, and knowledge who Eva-chan-senpai is and how she acted 80 years ago.
This variant is corroborated by the pacing of the first episode.
2) The pacing is insane and they jump through material. We get Fate and the bombing really fast, and the UQ Holder anime progresses after that too. Then you need to read the manga.
The anime adaptations of Negima cover a really small portion of the manga. What you just watched (the first tv season) is with anime original last few episodes, which replace the sudden turn into fantasy epic that the manga took. You thought they were fantasy-ish enough? Nah. The manga does it on a much larger scale, and way better.
Then there is Negima?!, which while quite enjoyable, has nothing to do with the manga, so it can't help you here.
Then there is Ala Alba and Mou Hitotsu no Sekai. They plainly don't make any sense if you haven't read the manga first. Great animation, great everything, but what they reveal of the plot is barebones, just enough so that they can show the scenes they want to show.
The objectively best part of the manga, the School Festival, exists only in its culmination scene in the first minutes of Ala Alba. Other memorable arcs, like Negi vs Rakan and the Palace Defense, are after the end of Mou Hitotsu no Sekai. It's best if you watch these ovas only after you finish the manga.
P.S. There are no such things as a Negima film or Tsukihime anime, don't let internet lie to you.