your almost done. You just finished the toughest job of all.
I would then, clean out the valleys good with bleach and water. Let dry thoroughly and even add a fan in the room.
Now, find your grout. I like the kind you mix yourself. Find the color you want and then begin your grouting work. tOO many people on this board have had problems with grouting because they do not read the instructions. Apply the grout with the proper squeegie tool, then squeegie in all four directions to force it deep into the crack. Then after about 15 minutes begin your fresh water clean down. you must get the grout residue off the tile before it sets up. After grouting, you may need to wipe it down 15 times cleaning the cotton rag each time. The grout will form a concave position which is OK. But get all that haze off the tile.
Then when done, be sure to add the silicon sealant.
Now, grout takes three days to cure out. This means no use whatsoever. Then the fourth day, apply the grout. Wait another day after sealant, then its yours to use.
Do the silicon caulking the day of the sealant. Silicon will dry in 24 hours.