i want to testify to the good results that i obtained thanks to silent nights. having suffered from depression since 1985, i became obsessed by my sleep, even going to a sleep centre in 1988, without getting any result.

How would the previous sentence be correctly capitalized?
I want to testify to the good results that I obtained thanks to Silent Nights. Having suffered from depression since 1985, I became obsessed by my sleep, even going to a sleep centre in 1988, without getting any result.