In oracle script 得 showed a hand picking up a cowrie shell — ancient money — sometimes with a road beside it: finding wealth on the way. Walking 彳 and gaining: to get, to obtain.
得 wears three hats, and learners meet all three early. As dé it means to gain: 得到 (obtain). As weightless de it links verbs to how well they're done: 说得好 (well said!), 跑得快 (runs fast) — the grammar glue of every compliment. As děi it means must: 我得走了 ('I gotta go'), the politest way to escape any dinner. One character, three pronunciations, all about what you get and what gets you.
A hand finding money on the road 彳 — to GET (and how well you get it).
说得好 'well said' and 我得走 'I must go' use the same character at different pronunciations — context is everything.