Hello Val, welcome. I looked at your profile and you have a very inquisitive mind. Your questions are common and so I am sure you can get someone on this group to help you. I am a 64 year old trans girl so different generations and genders but I will help as I can.
Wearing female items while you transition is cool; after all you are at the gender exploring stage.
I feel like this is a safe site but I would still avoid giving out your phone number unless you are really sure of who you are chatting with. And if you do it should be in a private message.
I live in Dallas and so if you are ever headed down this way I can give you some safe FTM contacts.