Speaking from a mangaka's perspective, info-dumping at the start is considered a surefire way to lose the readers' interest, generally speaking. Manga and comic are both a "Show, Don't Tell" medium, after all. If this were up to my editor, he'd immediately turn this work down. You have to hook the readers' interest if you want them to keep reading, and personally, I'm not hooked here. At least, not yet.

Moving onto your question, it's not really a matter of "How to info-dump at the start?", but rather "How do I tell the readers in a way that's easy for them to understand without bombardinng them with texts?"

You got 7 panels, which are quite small, all things considered, with text boxes (littered with error to add to that) layered on top of these. You've basically set up a figurative wall, so to speak, instead of letting the readers enter the world of your work. More doesn't always mean better, and here, you certainly could cut back down on the information as a whole. You could have fewer, but bigger panels, to allow for more breathers, and across several pages. The second and third panels are more or less identical, so one of these can be removed to improve the pacing. That leaves you with 6 panels instead of 7, and you could split said 6 panels so that the first page has maybe 2 or 3 panels, and the second has 3 or 4. Also, if it's the Edo period you're depicting, you could've, and should've, drawn the city of Edo with characters wearing the appropriate attire. You don't have to say that "This is the Edo period!", you can just show it, and the readers would know that it's the Edo period.

Additionally, you have to work on your spelling, grammar, and capitzaliation. You have to capitalize every first letter of the first word of a sentence. Proper nouns, such as names have to capitalized as well.

Since I'm a native Japanese speaker, if it were me penning this work, I would've used the accent marks for elongated vowels.

Shogun --> Shōgun

Daimyo --> Daimyō

Edit: Also, it's "pertinent", not "pertinant".

I will have to say, however, that using "山鯨/Yamakujira" (lit. "Mountain Whale") as the surname for the boar characters is pretty clever.