Job offer. Should I join ?

I have a job offer as a SDE 1 Frontend role at a Saas startup. I will be 25 in May and have 1.5 yoe and the offer is 17LPA. They have a team of 7 engineers. They have over 1m+ downloads on Play Store but very very small number of paid customers, so negligible revenue. They took funding 1.5m $ last year. I'll get the opportunity to kind of own the new product that we will be building. The job location is Bengaluru. I feel growth opportunity will be there as I'll be one of the few frontend developers but I feel very overwhelmed with the responsibility as I don't have much experience and I fell I'll be incapable of doing it. Also is it worth joining such a risky startup and shift to Bengaluru? I also have to work as a customer support person half day in a week because it's a small startup so you have to play every role.

Please help!!! Because eventually I want to join a bigger company which is well known and reputed because I want to get married and reputation of the company matters a lot in my community and all the knowledge I'll gain working at this small startup would be of no use as for interview prep at reputed companies you need to do DSA LLD HLD for which I believe I'll need around 1+ year just to prep and I feel I won't get time working at this small company due to the workload as the product is not yet built.