I am neither a Wizard, nor a Warlock. How can I get a "full-featured" familiar?

Question

Let's say I'm playing a 1-st level variant: human Ranger and want a "full-featured" familiar to deliver my touch spells (and use all other familiar features just like a Wizard does).

First thing comes to mind is the Magic Initiate feat, which provides access to a single 1st-level spell:

... choose one 1st-level spell from that same list. You learn that spell and can cast it at its lowest level.

Second option is the Ritual Caster feat:

When you choose this feat, you acquire a ritual book holding two 1st-level spells of your choice. Choose one of the following classes: bard, cleric, druid, sorcerer, warlock, or wizard. You must choose your spells from that class's spell list, and the spells you choose must have the ritual tag.

Since "Find Familiar" is a a 1st level spell, I can choose it in both cases. Am I correct?
Aside from multiclassing, what other options are available in 5e for getting a familiar?

Answer 1

You Can Only Do What The Spell States

However, this does indeed mean you can use it deliver spells with the range of touch, telepathically communicate within 100ft, send it to a pocket dimension, etc, as they are all specified in the spell itself!

You Can Cast Find Familiar With the Ritual Caster Feat

The spell has the ritual tag, so therefore it can be cast with the Ritual Caster feat.

Other Options for Gaining/Casting Find Familiar

• Multiclass into Wizard
• Multiclass into Warlock
• Multiclass into Rogue with the Arcane Trickster archetype
• Multiclass into Fighter with the Eldritch Knight archetype
• Ring of Spell Storing (thank you to Mindwin)
• Ask your DM for a custom made magic item

Answer 2

Jamie is correct, you may only do what the feat and the spell says, which permits all the things you've stated.

Your expressed hesitation with regards to a familiar being a signature Wizard feature likely stems from experience with 3.5 and older systems. However, consider that someone with the Magic Initiate feat cannot utilize the Find Familiar spell as effectively as a Wizard whom has the spell on their spell list.

Familiars are often very weak and a single hit can be enough to kill them. Thus, a ranger using the spell via the feat must be much more careful with their familiar than a wizard whom can ritually recast the spell many times in a day provided they have the resources to do so. Conversely, the ranger may only cast the spell once per day, so once it's been used for the day that will be it until tomorrow.

One last thing. You stated that you felt getting a familiar for free was OP. But I would point out that it is not free. The cost for the familiar was a feat, which is a very expensive thing. In exchange for a familiar, the ranger has given up 2 ability point score increases or any other feat in the game.