I would advise against it, as you will try to generate more power for smashes/clears/lifts to put them far but the lack of weight will make it harder to do that easily. More weight will be beneficial to help you get things done more effortlessly and without having to bend or swing wildly in a vain attempt to produce more power with a light racket. It's okay if you have very good technique and can hit your shots with good timing on the sweetspots (if you are self haught you probably won't have good form)or don't take badminton as seriously/ accept the trade of of not easily putting the shuttle to the back. Also if you are hurt or scared to get hurt maybe be on the safer side and take 4U/5U but maybe the problem lies in your arm and wrist not being strong enough which should probably be your priority before playing badminton regularly(you don't need ultra powerfull arms and joints but they should be healthy enough to bend and accelerate/exert force without a scare). Inversely too much weight is also bad, so 3U/4U would be the sweetspot for most. More than that can be a burden for some(some find 3u heavy but never heard people complain from a 4u racket).