I manage my own finances and use Boldin software to analyze tax implications of different strategies for Roth conversions, etc. I watched a lot of youtube videos by CFPs and they sound great, but using the software, which is similar to what they use, I have found that if you change any assumptions, the plan results vary wildly. The software has taught me that my guess is as good as theirs.
As far as asset mixes go, I see all sorts of recommendations about diversification. Most appear to me to be "diworsification". They'll say I should have 40% in bonds and 60% in stocks. Bonds are a piss-poor investment unless you need that money in relatively short term. With the King slapping tariffs on every other country, we're heading into high inflation. You don't want to be invested in fixed, low-yield bonds (10 year treasuries are at 4.5%- they aren't going to keep up with inflation) or CDs when inflation is going nuts. I own just a few stocks (BRK.B) and a few index funds. They've done very well for me. I keep a little money in cash for living expenses for the next year or two. I was planning on starting SS when I turn 70, but the King and President Musk may have something to say about that.
I'm considering moving out of the US, but with the recent attacks on our friends and allies, there aren't many places left to go where Americans are going to be welcome. Maybe Russia... ugh.