Bamm, I'd pick a residential or business street area with very little traffic. Practice a half hour a day on a daily basis. Get used to clutch, braking, handling of the Savage. Yes, it has more power than the little 250 and is geared a little taller, so after releasing the clutch, you are moving a little quicker.
After a week or 2 of this practice, you can then try the open road in traffic. There's no need to rush, main thing is saddle time to get used to the controls and feel of the bike.
After you start getting familiar enough to feel comfortable, then I'd use the bike daily to travel to/from work or school. The more regular in the saddle time you have will give you confidence.
Also, I would get some decent motorcycle clothing (jacket, overpants, leather boots covering ankles, gloves, full face helmet). These will help to protect from road rash in case you experience a fall. On-line there are decent textile goods where you won't break the bank.
Good luck on your new adventure!