Roller looks good, I have a white one like that, nice and soft. You might graduate to the grid, but I think starting with the actual foam one is a good plan. A tip from me is to roll slowly once you get the hang of ay required balance / planking etc.
And linger on the sore bits!
On gels I have always had my first at 6 miles in a marathon, have lots of oats and PP 3 hours before.
Oscarr I think your build up is awesome. I never did an easy 10 or an anything 10 the day after track, so you have excellent recovery too.
Ran to work yesterday, my first since the half on Sunday.
Planning on PR or a 3.5 race tomorrow morning.