Most Helpful Girl
Austin is a great city. Of course I may be biased because I live only an hour away.
Lucky for you Austin is a hot bed of cultural and social activity. There is much to do and discover there. Being such a liberal city (compared to the rest of Texas, at least), I'm assuming due to UT, Austin is in the forefront of going green. Because of that they are very bike friendly within the city. They also have numerous biking and hiking trails on their greenbelt. There are lakes and rivers to canoe and kayak on, or you can run, bike, or hike on the riverside trails. The night life is slamming and there is always some type of festival or cultural event happening.
Get a bicycle and cruise around town - people are pretty friendly. Find a meet up group or visit the city website to keep up to date with what's going on. Volunteer with one of their many, many non-profits. I honestly don't think you'll have any problems connecting with other people as long as you put yourself out there.
The only draw back about Austin is it's expensive to live there. In the last decade, there has been a migration from Silicon Valley because there is no state tax and the real estate prices compared to California was nothing. Because of that, the cost of living has been steadily rising. Also, it's going to be a HOT summer, ugh.
I have a really good friend that lives there and I make sure I head up there at least once a month to meet my cultural quota.
Austin is a great place to live and I hope you take the time to explore it all.