Everyone’s computer software environment is different than the next. From what programs they run or don’t run. So many variables into if you think your laptop is good enough.
You can download any version of Shotcut for free here:
This link is always displayed on the download page.
You will need to test Shotcut out for yourself to determine if it suits your needs. It may be a bit slow in what you think it should be doing.
Many people use Preview Scaling & Proxy Editing to help with editing on older hardware.
A forum member made this tutorial on Proxy Editing to help others. This video, along with other useful tutorials, can be found on the Tutorials page.