Well the higher level you are, the less time you’ll be spending looking things up, but it’s also important to have some grammar knowledge, otherwise you’ll probably have a hard time making sense of what you’re reading
But! If you feel confident enough to start, you can try to find something you’re interested in (and probably something with furigana), it makes the process more enjoyable that way – that being said, Yotsubato is a popular manga recommendation for beginners, there’s even a Yotsubato book club here on the forums
Other popular beginner manga recommendations are things like Chi’s Sweet Home, Polar Bear Cafe, Doraemon, Crayon Shinchan, etc
Maybe check out this thread as well for more info on ways to jump into reading: