Sure, here are the suitable words to fill in the blanks:

Dear Elena,

How are you? It's great to (1) **hear** from you. Now I'm going to share with you about my hobbies.

I have some hobbies, but my (2) **favorite** one is arranging flowers. I started this hobby two years ago when I saw some flower vases that my cousin arranged. You may think that this hobby is expensive, (3) **but** it isn't. We have a small garden behind our house. My mother (4) **grows** a lot of flowers there, so I can practise with them. I don't go to any class or club. I look at the patterns on the web and create my own. This hobby (5) **helps** me be more creative and patient. I'm teaching my best friend how to arrange flowers. What about you? Tell me about (6) **your** hobbies.

Cheers,
Mi