Visualization on a timeline without dates

Hi everyone!

I have a table with different users completing actions.

The users can start and end the action at different time stamps. 

I would like to compare how long each user takes to complete an action to each other and represent it in a visualization.

Could anyone offer advice as to what visualizations there are available (if any) in Power BI to use for this problem?

Thus far, I have done the following, but I suspect my logic is over-complicated:

1. Order dates by user from earliest till latest

2. Day user started action= Assign day 0 to earliest date of user, day 0+1 to (earliest date) +1, etc.

3. Date taken to complete action of user = (end date - start date)

4. date user ended action= (day user started action) + (date to complete action)

5. Visualize on a timeline

This is the code in SAS, but I would like to do it in PowerBI if possible:

proc sort data=a;by about date;run;

data b;set a;

by about date;

retain time 0;

ldate=lag(date); *lag function carries previous date over to next time period;

dif_date=date-ldate; *count days not submitted;

if first.about then time=1; *maketime=1 for each new speller(about);

else time=time+dif_date;

run;