My daughter is 6 she has CA and although she doesn't have any memory issues (sometime she remembers too much), she does have a lot of difficulties to face each day. Each one I would love to take away or make a little easier. Writing is very difficult due to pain and tremors. At the moment typing is also hard however her O.T. is going to start working with a touch typing programme next week. I really hope this helps as I am concerned she "falls" behinde at school although she is an intelligent child.
I'm 40 so in the grand scale fairly young. My memory is hopeless. Today I had to go to the supermarket to get the stuff I forgot yesterday only to forget about a third of them (this was with a list). I then got a phone call from the shop to say I'd left my purse. I forgot to hand cheese into the nursery even although it was in my daughter's bag. I then forgot to but my daughter's outdoor shoes on to walk home - thankfully I remembered my daughter. Hopefully I'll remember to get out of bed tomorrow. My reading, writing & typing are all very slow. I don't have any type of ataxia, your memory problems may or may not be due to CA.