Or even make your own portfolio by following techniques shown in youtube videos (the good ones) and ask your attractive cousin/sister/gf/mom/aunt/grandma (yes grandma also can do portrait, just not xmm style) as your model.
Duplicating someone else's style is an interesting way to develop your own at later date, too.
There is this book, in our National Library.
do borrow this book and read.
as for shooting opportunity;
you don't have to go too far to find all the events held by community club and resident club at you area, just check out the notice board at your block lift lobby and banners hang around your block.
you can find events held every weekends, some even two or more event on the same day.
it is a good source for you to practise our skills and build your portfolio, perhaps make some friends, and that is about it.
as on the business side of photography;
don't ever think about building some business network from your portfolio building source or contact, even someone want to engage you for your service for any personal event like birthday, or ROM, usually they don't have any kind budget for photography.
since they found you from where you shoot for FREE, they will pay you likewise.
it is the same where you start charging very cheap for your services, your referral customers hope to pay the same as their friend who hire you before, or get even cheaper deal then their friends.