I'm more than happy to share what I do when asked, but I don't give advice.
A sibling reached out earlier this year. They ended up buying TSLA, NVDA, and S&P500. I wouldn't have bought TSLA, NVDA, and told them why, but didn't encourage them either way. I'm sure they're happy they didn't listen to me, even after TSLA initially dropped and they were asking me what's going on.
Both kids are buy/hold investors, understand the basics, but they make their own choices. One is more engaged than the other, but realizes individual stock picking is hard and sticks with index funds. Our biggest discussion is VOO vs VTI. They favor VOO and I'm a VTI fan, but I'll admit, they may have me beat with VOO. The other doesn't care and sticks with VTI.
I recently helped a sibling of DS's girlfriend. They wanted to invested, but had no idea how to get started and their parents were not helping. Surprisingly, they had a great list of reading material and understood the basics, but were lacking experience in setting up an account (where?), buying the ETF/Funds (how?), etc. I helped them get brokerage/Roth accounts created, explained the differences with the accounts, etc, and offered to help them put in buy orders, but they figured that out on their own. They went with VOO too.