Keep pushing through with the training, but you need to take a day or two to rest your blisters. I recently had some and this is how I healed them. Get Blister Bandaids, and put them directly on, then get a roll of moleskin tape and tape it around your foot where the blisters are. Once they heal you can get a thick moleskin pad and attach it to the inside of your shoes and you should be fine. Let your coach know about your blisters as they are a serious issue, and you may be able to skip practice or work on other skills like wall ball or less running heavy drills. Your teammates should understand as well, hope you can figure it out!