Limiting Work in Progress will definitely not solve all the problems your team is facing. However, not limiting WIP means we are pretty much guaranteed to fall victim to time wasters. Without WIP limits, progress on process improvement is much slower. Teams that have imposed this practice from the beginning have reported growth in capability and have delivered superior business results.
A professional Kanban board solution should allow you to easily customize your board template as well as to set Work in Progress Limits. Kanban Tool provides this possibility. To set a WIP limit please go to "Settings", then "Board editor" and click pencil icon to edit Work in Progress Limit. Next, fill in the "Task count limit".