Typically self-instruction texts will either (a) include explanations (e.g. "Like the vowel in 'tape' or 'made' only without the 'ee' sound at the end") or (b) give examples from other languages (e.g. "French été, German Ehre"). More scholarly works will simply give the IPA (with or without explanations for non-cardinal vowels). As you've discovered, these days it's not difficult to find good resources if you want to learn how to pronounce these symbols.

Ugh. I just noticed there's an error with the very first symbol in the pronunciation guide I made. ɜ instead of ʒ. I'll have to fix it later.

Here's some of what I've come up with so far...

Pluralization

Plurals take the form of prefixes. They are:

/li/ Singular, specific. Example: /li/cat = the cat
/lʌ/ Singular, non-specific. Example: /lʌ/cat = a cat
/lɒ/ Minor plural; two to six. Example: /lɒ/cat = some cats
/lu/ Semi-plural; one or more. Example: /lu/cat = cat(s)
/lɜ/ Major plural; more than one. Example: /lɜ/cat = cats


Suffixes

/ʃi/ N. Possessive

/ʃʌ/ N. Female gender
/ʃu/ N. Male gender
/ʃe/ N. Neither gender

/i/ V. Past
/ʌ/ V. Present
/u/ V. Future
/ɜ/ V. Timeless

Gender suffixes are only used when needed for clarity.
Vowels (or words that can be used as vowels) end with a consonant.

Pronouns

/tin/ Impersonal subject
/sin/ Impersonal object

/ten/ First Person subject
/sen/ First Person object

/tæn/ Second Person subject
/sæn/ Second Person object

/tʌn/ Third Person primary subject
/sʌn/ Third Person primary object

/tɒn/ Third Person secondary subject
/sɒn/ Third Person secondary object

I like the idea of having a secondary third person pronoun. Take the following:

John argued with a stranger. The shouting ended when he punched him.

The second sentence is ambiguous. Did John punch the stranger? Maybe the stranger punched him! Using a primary third person for John (because he's the one being discussed) and a secondary third person for the stranger would make it clear.

Pronouns can be pluralized and given gender with suffixes. If both, gender comes before pluralization.
For example: her's could be tɒnʃʌʃi.

Pronouns can also be pluralized with suffixes.
For example: them could be lɜsɒn.

More usually called "fourth person" or "obviate third person" (contrasting to "proximate third person").

Has it occurred to you that many of these pronouns would be difficult to distinguish consistently in speech? Particularly before /n/?