You already know the shapes. Dakuten now moves to the た-row — and two spellings reveal an important truth about modern Japanese sound.

Dakuten ゛ changes the sound of the た-row. Read each relationship as a pair—not as a completely new character.
This is one of those places where the writing system remembers a distinction that everyday modern pronunciation usually does not.
For now, trust the sound and notice the spelling. You do not need to force an artificial “di” pronunciation for ぢ.
Likewise, づ is generally pronounced essentially like ず in standard Japanese. Later lessons will show why both spellings remain useful.
Select a character, play its stroke order once, then trace it slowly. The two dakuten marks belong to the written character too.
Begin with た, then add the two dakuten strokes.

でんしゃ is not vocabulary for a textbook. In Japan it is part of the rhythm of work, school, appointments, shopping, meetings and ordinary days.
Listen for it at stations. Notice it in conversation. The more a word attaches itself to a real place, the easier it becomes to remember.
I go by train.

How do you get there?
You already learned how to ask where something is. Now you can ask how to reach it. A small change—but a major step toward independent movement.

A dictionary may give you “okay.” Real life gives you much more.
だいじょうぶですか。 can check whether someone is all right. だいじょうぶです。 can reassure: “I’m okay.” Depending on tone and situation, it can also signal that something is acceptable or that help is not needed.
Learn the situation with the word. That is how Japanese begins to feel human rather than translated.

The next time you are near a station, quietly notice three things: where the station is, how people are getting somewhere, and one moment when you hear or could use a phrase from this lesson.
えきは どこですか。
どうやって いきますか。
でんしゃで いきます。
You are beginning to understand not only where things are—but how to get there.
Do not look for perfection. Listen once, notice what you catch, then listen again.
Your goal is not to translate character by character. Let familiar pieces begin joining into meaning.
I can read だ・ぢ・づ・で・ど, recognize that ぢ/じ and づ/ず usually sound alike, ask how to get somewhere, say I go by train, and understand how だいじょうぶ changes with the situation.
IJ-0016 continues the Foundation sound system and expands it again. The characters are becoming less like symbols—and more like Japanese you can actually hear around you.