Nothing is impossible if you really want to do it and have good intentions.
It will take time as everything demands time to build up.
But just start and do it serious and honest and it will work out fine, start with low amounts and good interest.
You need to feel your way forwards and go with what works for you.
My self got a small loaning service and i am still like a newbie, but I have been lending some money almost everyone has paid back.
I just building for the future and I don´t lend money I cant afford to lose since its hard to trust people, don´t put money you don´t afford to lose in the business since nothing is a guarantee.
If you doing it well people will see the process and the reputation will grow with time.
Just don´t rush things and go with what works for you, some people will try to push you down but just ignore them, as i said time will show your intentions.
Good luck!