Effective bodyweight exercises for building strength at home?

Hi everyone, I'm looking for some guidance on bodyweight exercises I can do at home on my yoga mat. My main goal is to become more active and incorporate strength training to build and maintain muscle. I do a fair amount of walking already, but want to step it up. I have some light dumbbells, but I'm particularly interested in bodyweight routines. Has anyone here had success improving their physique with just bodyweight exercises? I'd love to hear your experiences. Can you recommend any trustworthy YouTube channels or videos with good bodyweight workouts for building strength and muscle? There are so many options out there, it's hard to know which ones to trust. For reference, I'm a woman in my 30s, around 140 lbs. I try to get enough protein in my diet, but I know I'd need to focus more on nutrition to see real muscle gains. I'm mostly curious if bodyweight exercises alone have the potential to help me add some muscle definition. Thanks in advance for any suggestions or advice!