Let me be the first to welcome you to the sweet addiction of t ownership (odds are strong you will have 2 or 3 more in a couple of months.)
10 gallon tank is fine but you might find a little on the big side for your rosie (most t's can be kept in 5.5 gallon tank or something of similiar size)
Becareful about your ts climbing make sure that if she falls its not from any great height (falls of only a few inches can have the potential of killing your, the larger the t the greater the risk btw your rosie can get up to six inches in leg span). Most people will have a higher substrate depth to reduce headspace so if a t climbs and falls it won't injury itself.
Again welcome and if you ever have questions we're happy to help out a newbie.