1.2L ELSS MF investment at current market sounds sane ?

My brother recently realized he needs to invest ₹1.2L under 80C for tax savings after his company asked for investment proof. He’s decided to go with ELSS mutual funds. We’ve planned to invest ₹40k per month for the next 3 months in 1-2 ELSS funds. The idea is to stick to the same fund(s) for all 3 installments. For the next financial year, he plans to be more systematic, investing ₹25k per month (₹10k in ELSS and ₹15k in other mutual funds). I’ve been investing in mutual funds for 5 years and have seen good returns, but since this is his first investment, I’m a bit nervous about current market conditions . I don’t want his first experience to be discouraging. Should we go for MFs or other tax saving investments? He is 23 year old and has no liability.