Saving that much a year is a poor way to invest your money.
You need to invest in a 401k plan where you work or also
invest in a mutual fund using the Roth IRA.
Yes. Look into a Roth IRA. The money you put into the Roth account will grow tax-free, and when you take it out of the account at retirement, you will not be taxed.
Profit in a regular account from interest or capital returns (from stocks) gets taxed. In a Roth, the profits are not taxed.
Yes
Put $5500 in a ROTH IRA.
yes, unless you can save more