At the very minimum, I’d suggest waiting until you are actually working that 9-5 office job, before considering giving up your weekends. You may feel very different about things, once you are in that position.
My own situation is that I work generally 8-4 in a fully remote position. I like what I do and often spend my personal time reading and learning within the same field, just because I like that sort of thing. Even still, when the weekend starts, I have zero desire to go work somewhere else. I have a family I want to spend time with, hobbies I want to engage in, and just generally not be “on the clock”. There is a lot more to life than work, go do that.
That said, if money is an issue, I can certainly understand the desire to work more. My income is high enough that I don’t have to stress over money. So, the pressure to earn more just isn’t there. Any extra income would either just be used to pay stuff off faster or go into savings. If you are in a position where money is a significant stressor, then the extra work may make sense. Some extra time with your nose to the grindstone now could pay dividends in the future.
Overall, I’m in the camp of not spending all your free time working. Work to live, don’t live to work.