I am new too, and I've had a household altar for quite sometime without realizing it.
Mine is a shelf, and it has a candle on it (for Hestia and the household gods), and a picture of my great grandmom (I consider her as my guardian angel, my
Agathos Daimon... which is sort of like a Hellenic version of a guardian angel) and it now has a small bowl for offerings on it.
Now, I didn't make this altar for Hellenismos, I made it when I was about 8 because I just thought it looked pretty, so it could be wrong, but from what I've learned, it holds up as an altar to the household gods.
For libations, you could pour them out on the ground outside of your house, but if you don't want anyone to know about your religious beliefs because you are sure that they won't understand or will get upset about it, just pour the libations down a clean drain. Offerings, if they are edible, you could just burn them and pour them on the ground or consume them on the gods behalf.
For morning/evening worship, I guess you can just do a short prayer and offering of orange juice, coffee, tea, (insert your prefered morning beverage here), etc. for the household gods, and Helios (the sun) in the morning, and do the same thing for the houshold gods and Nyx (the night) before you go to sleep.
I'm still a newbie just as you are and I still don't get everything. So, I would take what I wrote above with a grain of salt because I've never read much about morning and evening worship, but that just seemed right to me.
Hope a more experienced person can help you more clearly.