Roblox Keyboard/Mouse

so yall, i have a keyboard and mouse, and i really wanted to play roblox with it, so i tried it, guess what happened, it didnt work, so i saw a youtube video, it was with switch control, so i tried it, its really bad and annoying, i tried it on a huawei, then only arrow keys worked, i just want WASD and space not arrow keys plus i couldnt jump, and now i am kinda stuck, so can you help me but without switch control, so thanks. I’d be very happy if you helped me.