I am male 23 virgin.i feel that i have 30 degrees frenulum breve,as i researched.i don't have issues with masturbation.but,will it cause any problem in future during sexual intercourse or is it manageable? any home remedies for frenulum stretching?

Let it be. Use a water based lubricant like K-Y jelly for intercourse or masturbation. The frenulum will adjust as you age. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV and Covid vaccines. Wish you good health!