Friendly advice from an election staffer: If you think you want to be part of a first day march to the polls on the first day of votingOctober 8, do NOT fill out a vote by mail request. Voiding out a vote by mail request slows down the line.
Also have realistic expectations. Your mailed ballot will NOT be in your mailbox October 8. That's the first day they can be mailed OUT - and because of the Columbus Day federal holiday they won't actually go out till October 9. (Columbus Day is the only federal holiday our office is open and I don't know of any auditors who will be closed that day - so you WILL be able to vote in person.)
Don't panic on day three and get scared about your ballot being "lost," and don't expect to see a mailed ballot in your box till the end of that week at best.
And don't fill out an absentee request just to make the staffer or volunteer happy if you have no intention of actually voting it and are thinking "I'll just go to the polls." That also slows down the line.
Personally I think in person early voting is a safer option for people who can. Vote-doesn't-count kinds of mistakes are not common, but when they do happen they are almost always on mailed ballots.