Just go and ride your bike on hills. See what happens.

If it's not working out for you even after you've trained quite a bit, and learned more about gearing and other technical issues (from this wonderful forum, among other sources) then you can get a different cassette (the cogs at the back) for example to help you go up hills.

Pretty bike. Lapierre is an important bike maker in France, sort of like Trek in the USA.