As and like

We can use "as" or "like" to tell that 2 things look like. ("comme" in French).
But I'm not sure .... of the english use.
I'm trying .... :

- My sister isn't like me, she doesn't look like to me.

You can say: "My sister isn't like me." (or) "She doesn't look like me." They don't go well in one sentence (If you wanted to make this all one sentence) you could say: "My sister is nothing like me, she doesnt even look like me."
- It happens like a dream
- It will be like she said (you could say "as she" but its not natural.)
- I love the sea, in summer and winter (the "as" doesnt really work here. if you wanted to use "as" an example would be...) : "I like oranges, just as I do apples"

I hope this help! If you have anymore questions, feel free to message me.