I am new here

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Hiya
I have just joined this site after bit of internet search.
I am 173 cm and overweight.
Have a sedentary life style and my job isnt helping me either.
Plan is to go down to at least 80kg(I am now 89Kg)
Since last 5 days I have started walking 1.5 miles over 30 mins.
Have started doing some dumbells exercises(max 10 mins)
Anybody who could offer me sincere advice is welcome.
I am from South Wales.