Yup, I was in your boat a few years ago! It was only after I had graduated and gotten employed that I started to get back into making comics (prior I had done some comics in high school but I mostly took a break from drawing during college).
My advice is to first give yourself some time to just adjust to and get acquainted with your new job. Get a feel for what your schedule feels like with just 1 commitment to start. For me it was only several months after I started working that I decided that I wanted to figure out how to slot drawing back into the formula. For some it might take less time or others more.
When I finally buckled down and decided that I wanted to start drawing again even in my limited free time... I found it useful to actually do a drawing challenge tbh. Inktober of that year was the following month so I did that for the first time, but of course anything would work. In that case it was just building the habit of drawing again by doing a little something each day. The drawings weren't always gorgeous and some days I had to do 2 in one day or something in case I just didn't have time one day after work or other plans, but somehow I was able to complete the whole month and that set the foundation that I needed to begin working on comics. Once you figure out how to draw literally every day (or almost) then finding a few times in an average week to sit down and get some work done is easier!
I don't think doing a challenge is necessary per se, but I think it would be good to try to draw consistently for a period of time like that before deciding to embark on your comic journey because you can then get a more realistic idea of how much time you'll have and thus how long things will take you to complete which is important for big picture scheduling.
Lastly my most important tip for maintaining mental well-being and just juggling multiple balls like this is to be kind to yourself. Part of the above habit-building stage is to figure out how much you can realistically get done per week/month while working, so set your comic schedule accordingly. Don't try to match someone else's schedule arbitrarily, find one that works for you. Whether that means weekly uploads or bi-weekly, or monthly, or whatever. Also allow yourself to sometimes miss self-imposed deadlines and don't beat yourself up over it. When I started my first comic I was fired up, and so I had a really consistent and rigorous schedule of a page a week uploads where I was actually drawing 2-3 per week. But that only lasted for a few months. After I settled into the realities of how that was negatively effecting my other hobbies and social life I dialed it back quite a bit, until eventually settling into week-and-a-half or bi-weekly updates which just worked better with my schedule.
in short, it's absolutely doable
So far I've made 1 70-page comic while working full time over the course of about 14 months, and I'm currently working on another one behind the scenes (after taking a like 6 month break xD)