According to my dictionary, 「に」 indicates more about the terminal point and the direction, whereas 「へ」 indicates about the destination and its direction. In addition, 「へ」 looks into more about the journey towards the destination whereas 「に」 looks only at the terminal point. It is very difficult to explain and either way, they are quite interchangeable.

So... I can say 'place' ni imasu and 'place' ni/e ikimasu, right? I think I understand, thank you, it was very important for me!

Hi, as Kota-san said, we use both へ and に as "to + place" in English, we don't say うちへいます, the correct is うちにいます because this に is "at/in", isn't it? However, in my opinion, it's a bit more natural to say うちへ/ にかえります if this うち means "my" house. I hope this was helpful. Greetings.

Watashi wa uchi e imasu. Is it correct?

Really? Thank you)