There is a massive fundamental difference between "stock pick advice" and "the broader market is in a bubble" - which are you asking about.
I like talking stocks with friends, and certainly welcome advice. Almost exactly 1 year ago I was talking to my friend about stocks, we each convinced the other to buy a specific stock. The one I pitched is up ~400%, the one he pitched is up ~200%, worked out quite well for me (honestly I'm shocked BOTH picks went up so fast, the theory was based on a global macro-trend that needed a few more years to gain steam, but I guess the market saw the same thing and invested ahead of it...).
As far as the broader market is in a bubble, who knows and more frankly who cares? The broader SP500 P/E is certainly higher than historical averages right now, and who knows how the pandemic will ripple through the economy over the next few years, but generally speaking there is a bad success rate of trying to time the market, just place your money down and walk away for a decade or two.
My advice? If you have the stomach for it and want to live risky buy 10-20 stocks of companies that have good fundamentals and can cash in on long term future growth trends, or even better are the ones defining future growth trends. If you don't have the stomach for it put your money into a super broad market ETF and just ignore it.
You want to know something I was told that really blew my mind on investing? If you bought 20 stocks and 19 of them went totally bankrupt and the 20th was Apple or Amazon or many others in their early days, you still would have gotten better overall portfolio returns than putting all of your money into a broad market ETF! I realize there aren't great odds that you buy the next Amazon stock (and if you think you know what it is, I WELCOME YOUR STOCK PICK ADVICE!), but there also aren't great odds that the other 19 stocks you buy go bankrupt either. Personally I got bored of broad market ETFs, and so far since I switched it worked out much better for me than had I stayed in my broad ETFs, but maybe I just have good advice from friends :)