Welcome to the Forums, Karen! And don't worry, we all gotta start somewhere, right? Ask away!
To send pictures you have quite a few options here. The usual one is sending an MMS (a 'text' with pictures); this does use your mobile data and is basically a simple e-mail but from phone to phone.
Then you can do that via Bluetooth or WiFi, but while that will work easily with most phones, iDevices don't work well with 'open' Bluetooth connections, so they will need an extra app to allow that. You can also send them via instant messaging services like Facebook's Messenger, Whatsapp, etc. or though e-mail.
Another option is to just upload everything you want to a cloud service like Dropbox or Google Photos and then share the link with whom you want and they can access the media from there.