[int_19h]

In pretty much any language there's no single point on the vowel chart that actually identifies a vowel - it's a spectrum with numerous allophones. Conlangs like this one are generally constructed in such a way as to allow maximally wide spectrum that is still distinctive. So if you pronounce it the way you speak English, that's still fine.

If you want more precision, generally speaking, the value of the character in IPA will match the actual sound value, except for "j".

[Aeolun]

You are going to get a lot of weirdness mixing a, e end i up.

[int_19h]

Yeah, I mixed up two unrelated things that I shouldn't have They don't recommend using English as a guide for vowels for that exact reason - it's one of the most nonsensical orthographies in that respect. But the website only says "like English" for consonants, where it kinda sorta works (although they forgot to say that "g" is always hard).

[swiftcoder]

That's true going between English and Romance languages anyway