Translation of downhill in Spanish

Yes, as usual, if you don't see me on messenger just drop me an email. And yes, your sentence is almost perfect, but I would like you to refer to it as lower end... so maybe there are similar words to 'enrichment' and also you could use the negative form.
He was educated as Roman Catholic, converted to Evangelism after he married her and he raised his son and daughters by the Muslim faith. They develop skills, make you get used to it, and when you are into it, whoosh, they disappear at once.
I want learn Spanish because of my girlfriend from Guatemala. She is from Latin America. And of course I want improve my grammar too. I like to hear it, but speaking is still hard. Hasta Luego.