I think you shouldn’t say convince. Instead stick to introducing them to Bitcoin. How can you do this? It’s simple and straight forward; tell them what Bitcoin is, explain the whitepaper and its content to them. Show them statistics of Bitcoin adoption and even price increases over the past years, explain the value they could get from delving into it, but also highlight the disadvantages so they don’t think it’s a 100% safe haven.
There's already a wrong impression when people hear that they are being convinced into something. I don't want to be rude or whatnot but many does have a bad experience about being done so and their friends have tried to convince them into something.
You're right that it shouldn't be all about convincing.
It's giving them a nice introduction about Bitcoin and there are a lot of resources that they can be introduced to. In YouTube, there are videos that are like Bitcoin for dummies and such.
The same goes with books and e-books or pdf files.