R script/visual for forcasting

Hi friends,

I need to use forcasting feature of R Language to pedict the enrolments for next 12 months. 

Due to my negligible knoweldge in R Language i need some help.

Can someone help me with the code/guidance for this.

I can sent startdate + Course enrolment id to R studio which need to coded to give a barplot which predicts data for next 12 months.

This is the grafh i have in power bi, barchart=x=Startdate y= Distinct count of Courseenrolmentid

This is how data looks like in raw format.  Can someone help me out. When i tried to work on R i am not able to plot bar chart by sending date value.

If someone can give some guidance/help would be awesome.

Thanks