I'm no algae expert, but that does not look too bad assuming that it does not get much worse than your pictures show. The ole' slimy stuff never is appealing to the eye really, but your algae situation is not out of hand nor does it look like it would pose any hazards to the pond occupants.

Let's see what kind of expert advice comes your way, in the mean time, WELCOME to the club!

Questions likely to come are...

What size is the pond, surface acre, max depth, average depth?

What size watershed feeds it?

What feeds it, street runoff, wet weather creek, spring etc?

What's the water clarity like, how far down can you see a white coffee mug.

Fish on!,
Noel