Yes, you can open a hive two days in a row, although if you can wait another day, it might be better. Without doubt, many beekeepers will tell you to leave the hive alone as much as possible and only inspect when necessary. And it's true that every inspection will somewhat stress the bees and perhaps cause the queen to temporarily slow down a bit. Especially if you're using smoke, which you should, especially as a beginner. Ideally, you would not inspect a hive more often than once a week, unless something out of the ordinary is going on. However, as a new beekeeper, it's also important that you gain experience and get comfortable with working with the bees. Randy Oliver has an excellent page for beginners, I strongly recommend you check it out:
https://scientificbeekeeping.com/first-year-care-for-your-nuc/. Randy is of the opinion that newbie beekeepers need to learn, and therefore it's OK for first year beekeepers to open the hive more often, but preferably not more often than every other day. When I started out, I opened my hives more frequently than that, and didn't notice any ill effects. I think it went well because I used very little smoke (beginners tend to use too much smoke, which stresses the bees) and moved slowly. The slow movements of a good beekeeper remind me of Thai Chi!

Good luck, and don't feel embarrassed for feeling apprehensive about the bees! My first hive built up super quickly by the time I I did my first inspection, it was overwhelming. With thousand of bees flying around me, I was asking myself what the heck I had gotten myself into! 😂