Real Estate Photographer Independent Contractor - Mileage and Expenses question

Hello:  I started working as an Independent Contractor (Real Estate Photographer) in May.   Question about expenses:

 

-Typically, I use my own vehicle to travel over 500 miles per week.  Do I just enter total mileage for year when I file taxes or is it better to use Quickbooks on a weekly or monthly basis to report mileage? 

-Can I deduct small meal fee each day I'm working ($5)?

-Can I deduct my business and equipment insurance,  Health insurance and SEP (Self-employment Pension - only added $500 so far)?

 

Thank you so much!