I'm sure you will enjoy Innsbruck. It's a lovely area and apparently the weather has been great this summer. Now to your question. The accent in Austria is actually quite different. It's just like with English, for example American English and Scottish English sound so different, but it's still the same language. You learn so called "high German" in the course, so people will understand you no matter what accent they have themselves. If you have mastered all the lessons up to 1.4 then I'm sure you will have no problems having a basic conversation, booking a hotel, asking how much something costs, ordering a drink and talking about where you are from. Just try to use your German, it's a great opportunity to practice. Enjoy your trip! I would be really interested to hear how you get on.
P.S.: By the way... it's more common in Austria to greet someone by saying "Grüß Gott" rather than "Guten Tag".
P.P.S.: One sentence you might also find useful is "Können Sie bitte langsamer sprechen?" (Could you please speak slower).