In type 2 baldness hair transplant will definitely help you but make sure you go to a senior hair transplant surgeon who also guides you how to prolong the life of remaining hair and helps minimize further hairloss. 
Though any technique by an experienced hair transplant surgeon would be effective but FUE especially FUE with DHT would anytime be preferred over other techniques

For 21 yr old males receding of the hairline is the beginning of Androgenic Alopecia or male pattern baldness. It needs to be evaluated at this stage if the progression can be significantly delayed by means of local applications and therapies and if it had already receded to an extent that the person is not comfortable by just stopping further loss but wants a correction or in other words want to get his original hairline back then hair transplant is a straight forward and easy option and a long term solution.

At 27 years of age in females, the decision to go in for hair transplantation has to be taken after a proper checkup and trichscopic examination ( microscopic evaluation of scalp along with the hair shafts ). But as an overview you can understand that hair transplant is not done in females for hair fall or generalized thinning but when the thinning has gone to the extent of visible skin showing through the thinning of the hair. Before it reaches this stage of visible loos there are other more conservative methods of treatment and therapies which can be of help and should be tried first. In case the loss is to the extent that at places skin is visible more esp at the place of parting or the front or the middle portion of the head then it is an indication to go for hair transplantation in females.

But virtual platform has restrictions, thus I would further encourage you to reach out to me, or other specialists and this page will help - Dermatologists.

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