Am I allowed to pray salah and perform other Islamic rituals if I come in contact with my semen

I am a 16 year old muslim. I watched porn and mastrubated for the past 3 years. Now I stopped however I mastrubated in many places within my house (chair, bed and etc). I performed ghusl but I didn't clean the semen on these locations where I mastrubated. I don't want to tell this to my parents as well. It been 3 days since I last mastrubated. If I come in contact with the semen can I pray salah and perform other Islamic rituals