Advice on buying bitcoin

I don’t know much about it. My partner invests in it. He has a lot of money in it. I’m thinking either just put in 10k with the intention to leave it there for 5 years at least

Or top up amounts every time I have savings like $50 or $10 a week put it in bitcoin

Thoughts? I know I’m asking reddit for financial advice but I believe there could be some good tips on here