how to use altair simulation trial version ?

Dear @Tan Fetta 

Free license 

You can use the free license to download from the site below.
https://altair.com/free-trials

For reference,
1) Casting analysis references are located in Documentation.

2) If it's installed, help's document will be helpful.

If you stay near to the Altair office, you can contact the Altair engineer.
https://altair.com/global-locations

I hope it helps you a little bit.

Thanks and Best Regards,
Sung-Moon Kim