Wise has been mentioned and I would also recommend. HOWEVER, remember that money held by them isn't insured the same way as at a bank. For instance, I would put money in for long enough to have an auto transaction when an the interest rate is what I want to then send on to my French bank account but I wouldn't simply hold cash longer than necessary. Also useful if you get their debit card so you don't need to take out cash in different currencies on a trip. You can transfer the money within "accounts" on the app and then use debit card to draw from appropriate one. Fees have always looked fair when I did comparisons.
(Also note that US requires foreign bank accounts with holdings greater than $10,000 to be declared yearly around tax time.)
I don't have ADHD - but as I've heard commonly expressed by women... Stress about unfulfilled tasks makes getting and staying in a zone where sex feels possible and enjoyable so much harder. I can only assume ADHD makes trying to refocus on the moment extra challenging.