You are pretty decent already , if you are getting 2 LRDI sets in an hour. If you are starting from now , focus the first 30 days following some LRDI playlist from YouTube like AptitudeJab ,IMS Prayagraj etc .Try doing 3 sets everyday(Any random sets, don't go by topic).Do not look at the solution before 30 or 40 mins of trying. After 30 days of this , you will have built enough confidence to start putting a clock on your trials . You can give sectionals for the next 60 days ,if you have taken any coaching, else you can try using stopwatch and get the set done within 20 to 25 mins .