Is buying a 30kg dumbel set with connector bar good for home workout?

31, Male, 5'8", 65-70 kgs. Been going to the gym the last couple of years pero nahinto more than a year ago.

Diet plan includes but not limited to:

Breakfast - Oatmeal, orange, gardenia w/ pb or milo

Lunch - 1 1/2 cups of rice, okra/chicken/beef/veg dish, banana

Dinner - 1 1/2 cups of rice, 2 boiled eggs, milk

Btw, the plates are not cast iron--they are of pe cover and cement mixture. Price is 1k. Is that good enough o should I go for the cast iron ones?

Will buy additional additional plates na lang aftee 2-3 months after makapag progress.

Workout will be whole body, and nakapag search na ko ng vids and reels on how to target each body part.

Thank you in advance!