UI Path community edition is great tool to start learning RPA tool, this is absolutely free for individual developers, open source projects, academic research, education, and small professional teams, non profits and small business with an annual turnover of less than $1 million or 250 workstations. You can get the free community from below link
From where to download
What is trial period
The Community Edition needs a refresh after every 2 or 3 months. This means that you have to send them your device ID, using the below link and they will refresh the license for you for next 2 or 3 months.
Will I have to pay after trial period
At present community edition is free and I have renewed my licence 3 times already for free, but not sure if they have plan to stop this free renewal in future or not.
How will I get support on free tool
They have very active community forum, you can post your queries on below forum for any issue on using this tool or any query about using the tools
How can I get free training on this tool
You can also register using below link for free UI Path certification , you can start with their Level-1 Foundation training, I have personally done this certification and they have really a great training material
Feel free to provide your comments if you have any question