I can read Hiragana/Katakana fine i still don't know Kanji. - I take classes so i understand some sentences/sentence structures (still a beginner)

Question :when reading Japanese how can you tell when 1 word ends and another beings, the words are so close together! i know of the particles and i try and look out for them but how can i know if the word ends with "ha" or starts with "wa" - other than the particles are there any other ways of knowing?

- I really hope i made sense and any tips Majorly appreciated