When meeting a deity in meditation, the first thing to do is to make sure they are who they say they are. During meditation I have met some nasties who were not who they said they were, but fortunately I realised this before they could do anything to me. Then there’s always the trickster deity who’s just messing around with you for a good laugh.
The best thing to do is to carry some form of protection with you in case the entity you are speaking to is not really a deity at all. If you are speaking to a nasty it will disappear when you put protection up. Protection can be anything from white light to a spell or a small ritual – it depends on what you are most comfortable with.
I recommend wearing something around your wrist or finger when you go into meditation. It doesn’t have to be anything expensive, it can be just some thread braided into a cord with a spell attached.
Other forms of life can be met in meditation that are not deities. Some people meet animal totems or animals. Others meet people that are symbolic to them.
Meditation is the best way to communicate with your deities and other lifeforms. Just make sure you are not communing with anyone or anything that could be dangerous to you.