I don't have a whole lot to add, but in addition to the above "Create buffer before posting" (in case you're not aware, "buffer" is basically content that you have ready ahead of the scheduled upload date. I.e. say you do 1 episode a week, have like 4 or 5 at least done before posting. You can never have too much though):
When planning your first episode(s) try to gauge how far into your story a reader would need to get "hooked" and try to reach that point in as few updates as possible. If you're planning relatively long episodes then this may just happen within 1 or 2 episodes anyways, and that's great! But if you're planning to do shorter updates (say, 1 page per week, so around 5-8 panels) then you may wish to include a longer-than-normal episode at the start to accelerate the reader to the plot hook. I hate when I see a new series with an interesting synopsis but the comic drip feeds content so slowly that it might take a month or more of updates to reach the hook. Personally, if I'm not intrigued within a few updates, usually I won't commit to the rest of the series. You want to try and hook new readers as soon as possible so you should try and reach that point within the first 1-3 episodes (max) even if those ones have to be longer than the norm, imo.
As a personal anecdote, my first Tapas series featured a page-a-week upload schedule, but my first episode was 7 pages long. I picked that length because it got people all the way through the first scene which I thought was a good point for people to get a taste for the series overall. If you like what you see there, you'll likely enjoy the rest of the series. And if you don't, at least there's enough content right away to make that decision.
