Install RASA X in Ubuntu

Hello Team, we are trying to Install RASA X in Ubuntu but it is taking a lot of time. We have python (version 3.7.6), pip (version 20.3.3) and RASA (version 2.2)

we tried installing RASA X using the following command: pip3 install rasa-x --extra-index-url but it downgraded our RASA version to 1.8 which affected the working of code since we followed rules mentioned for 2.2 version hence, we used pip3 install rasa-x==0.35.0 --extra-index-url command to install the RASA X version 0.35.0 which is compatible with RASA 2.2 version but it is taking forever to get installed

please guide us.