Advice on drivetrains..

My current SLX rear cassette is on its way out and am thinking about getting rid and also removing the front mech for simplicity purposes.

The question is a 34t or 32t single chainring, combined with a 11/36 rear cassette.

My local trails are Terrey Hills 50k+ with Red Hill thrown in for good measure.

I ride up the Maybrook & Manly Dam big hill climbs generally in granny gear, will I be walking with the new conversion.? or just don't worry about it, accept the fact I am 45 and need the extra help.

Any advice is appreciated

W