Learning something new always should be fun and community is the best place to learn if your are new.
Start doing this,
1. Make sure you have at least basic database knowledge.
2. Try some basic charts like table,bar charts etc.
3. Then try to add some conditions to expressions
4. Then try to solve questions on community by trying it on your own.
5. Qliksense is great but also learn Qlikview, it has more functional possibilities.
