+1 to the average advice so far. Get the 401k match, the rest in a Roth, both in something like a target retirement fund. I'd prefer to go with something like a 2055 fund instead of 2045, just to get more equities since you will have a long retirement. However, there is probably very little difference between them now. You should be very high in equities now because you have a long time to ride out the market dips without making withdrawals. That's your best bet, historically, for long-term growth.
Once you fill up your Roth contribution, go back to the 401k until you max it out. With $8k/year I think you might have a little left over after a maximum Roth contribution. You should be able to withdraw your Roth contributions in an emergency without a penalty, but the 401k contributions are pretty well in there until you hit 55/59.5. So make sure you have cash on hand or a taxable brokerage account with some emergency funds before committing everything to the 401k.
Once you fill up your Roth contribution, go back to the 401k until you max it out. With $8k/year I think you might have a little left over after a maximum Roth contribution. You should be able to withdraw your Roth contributions in an emergency without a penalty, but the 401k contributions are pretty well in there until you hit 55/59.5. So make sure you have cash on hand or a taxable brokerage account with some emergency funds before committing everything to the 401k.