I have some question related to transportation engineer. I live in US and just recently graduate so: 1) If I donot have

[answerhappygod]

I have some question related to transportation engineer. I live in US and just recently graduate so:
1) If I donot have any experience or internship during my undergraduate, should I still apply entry level now or I plan to take a year off to complete multiple internships and will come back to apply for entry level so which option is wise ? And in case I took a year off to do internships, will employer look it as bad and red flag in your experience ?
2) If I get an entry level jobs,will they usually training for me or majority of company donot train at all ? And how long will they usually train ?
3) Which software does traffic engineer use daily ?
Thanks in advance