I suggest you first:
Do a credit check
Do a criminal background check
Do std testing
If she passes all of these 3 checks, then I'd ask her to marry me.
But first, if her father is alive, ask him for her hand in marriage.
My brother put engagement ring inside a Cadburry egg and
gave it to his girlfriend.
Yes women like it when a man proposes on bended Knee.
Personally I like other precious stones better than diamonds which have more color. I would look on Ebay with her as they have many incredible rings at a fraction of the normal cost including diamond engagement rings. I would let her help you
select a ring as she will be the one wearing it for a lonnnng time.
However, if you want to make it a total surprise, you need to find out her ring finger size. I had a solitary diamond and disliked how it always swiveled around my finger and wouldn't stay centered. I also disliked how it projected out as it frequently snagged on things and it damaged the setting.
Personally I like rose gold the best over white and yellow gold. It is magnificent. There are platinum rings and some are made of platinum and gold, stainless steel and gold, and these are dazzling.