Deep breath! you are asking all the right questions! I'm going to dump some reading material on you. Take your time, read, ask questions. When you feel confident, then you can make your moves!
The part about percentages confused me - where do those numbers come from? Those funds were what I had set up by an advisor a long time ago when I created the accounts. I'm not 100% sure what a low cost diversified etf is (even after googling). Are there particularly good ones I should choose? Is it easy to sell and switch on Fidelity's site? It all sounds terrifying to me! :)
The percentages refer to the
'expense ratio' of the funds you are invested in. The expense ratio is how much money the mutual fund company charges to run the fund: salaries, printers, office space, etc etc. Higher expense ratio is bad, lower expense ratio is good. This is why the folks here like
Index Funds. Index funds follow an index, which is a predetermined collection of (usually) stocks. A popular index is the S&P 500 index. There are also indexes for the entire US stock market, the entire US bond market, and various combinations of international stocks. Since there is no team of people researching and picking stocks, the cost to run the fund is much much lower and you get a much better chance at decent performance (stock picking is hard to get right and expensive even if they make bad picks).
Here is a more detailed explanation of mutual funds and fees:
https://www.bogleheads.org/wiki/Mutual_funds_and_fees I didn't know the bit about pre-tax accounts being ideal for retiring early, I've only heard to do Roths if you are younger. Do you have more info on this topic? I do have the option to have the 403(b) be pre-tax instead of roth. Is that something I should consider switching? I also have an option for a roth or traditional 457, but I don't fully understand it or it's benefits.
The advice for Roth vs traditional is difficult because there is not a one-size-fits-all answer. In general, Roth accounts are better when your current tax rate is lower. This is because the money is taxed when it goes into the account, and all growth is tax free. If your current tax rate is higher, it's generally considered better to use a Traditional account that is not taxed when it goes into the account, but all growth is taxed when you take any of the money out of the account.
There is also a dude who did a very extensive writeup about traditional vs roth accounts. You can check it out
here.
And here is a nice
general guide to 'investment order' for US investors written by a nice forum contributor.
re: 457 accounts. These accounts can be great because you can usually take money out of them without penalty before retirement age if you no longer work for that employer. 401k/403b accounts impose a penalty for taking money out before retirement age, which can be tricky to get around. I have a few thousand dollars in one that I am very excited about.
And finally, here are two resources for learning about investing in general. 1)
J Collins' Stock Series, a series of blog posts that cover the basics of investing in a very approachable way. 2) the
Boggleheads Getting Started guide which covers much of the same material and has a ton of articles about pretty much everything.
Good luck! And keep asking questions!