JOLT hosts 1-2 subcite weekends a semester, only expect you to sign up for 1. When there are 2 weekends, that's to allow for scheduling flexibility. You'll be assigned to a 4-hour time slot on one of the weekends. There will be food, and you can ask questions. You finish up on your own time in the few days following. Most ppl end up taking around 6 hours total (incuding the 4 hour in person), though this may be better or worse. We did surveys each semester asking how long people spent, and most answers clustered around 6, with usually one or two outliers.
The editing track is as follows:
Subciter -- Line Editor --- Article Editor, with each managing those below them and in charge of more of the article.
JOLT has an internal review system where you review those above and below you, and these reviews are used to make appointments.
You start as a subciter, and then can apply to be a LE the next semester. The technical editor (an elected position) appoints LEs based on reviews. AEs are appointed by the EICs and Executive Editor (elected positions) and are part of the Executibe Board.
Submissions is something you generally get involved with as a rising 2L, as a submissions manager appointed by the Submissioms Editor(s) (elected position). Both are part of the executive board.
Finally, as a 1L you can participate in Digest, where you can write things that get posted there. The time commitment there is basically your choosing.
Most other executive board positions are elected, including Outreach Editor (party planning), Speakers Editor (bringing speakers to campus to give lunch talks), Managing Editor (the money & sponsorship managers), Communications Editor (manages newsletter and social media) and more.
Elections are held in the Spring in several rounds (more 3L oriented positions first) and anyone who has participated during either semester can vote.
During my time there were around 50-60 slots for the executive board with a wide range of tasks and responsibilities. If you're interested, then subciting as a 1L is a useful first step. Line editing is an option for 2nd semester 1Ls who subcited first semester.