anyone have kids young ?

i am 21 and my bf is 23, we’ve been together for 7 years and i just found out i’m pregnant. of course i’m feeling doubtful since i just lost my mom 6 months ago and my mental health feels not at its best. my bf and his family are so excited and we live with them btw. his mom is super supportive and wants to take care of me which is nice since i would love if my mom was here right now to do that. but i’m just scared as normal can i really do this ? i always knew i would be a good mom but i know it’s not all it’s cracked up to be and it’s hard/stressful. tell me your experiences please or any advice you have for me. thank you :)