First, know which purpose you use this for. [Professional] or [Casual]

If you pick casual, try other free programs.

Software such as Al are made by many software developers and takes a long time to refine and build. So therefore, is definitely recommended you pay for the software since to make Al it costed a lot to hire software developers. Annually, a software developer earn from 50k-110k! So if you want Al to be alive, then support them by paying for the software.

1. 30 days free trial
2. Adobe Creative Cloud (Cheap subscription for much benefit!)
3. Use alternative software

[Highly not recommended] If by some rare chance you cannot pay for the software but really wants to use it for whatever purpose, then google and YouTube is your best friend.

For the other comments bashing this question:

Please understand there are young teenagers out there wanting to learn graphic designing and probably have enough experience to use Ps or Al; however, they cannot afford it themselves. Pirated version of Adobe software is indeed illegal and bad, but if the software is used in a good intention (and paid for the software once the ability to profit [then]), I don’t think the developers of Al would be angry at that.

Is just saddening to see designers angry at a question when designers are suppose to see the world in different lenses and with an open-mind. You will never be successful without an open-mind and patience.