Have been gone for over 1 year and coming back today

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My goal weight was 155 and I got down to 161 and felt great. Never hit my goal and was so close. I am 175 now and wanting to lose 20 lbs and make my goal.
I am looking for info on the Keto diet , anyone have info on here and know of a good App for doing keto.
I am diabetic and have been trying to eat keto for maybe 1 month and was 189 4 weeks ago and lost 14 lbs but the great thing for me is my blood sugar readings are normal and better than they have been in 15 yrs.
Appreciate any info
:)