Well this doesnt work yet, and is likely not the correct way, this needs more thought put into it, probably a complete rewrite is advisable because bringing this into a shape where it could have multiple Providers is hard

internal/database/manga.go

@@ -0,0 +1,18 @@
+package database
+
+import (
+	"bytes"
+	"mangaGetter/internal/provider"
+)
+
+type Manga struct {
+	Id            int
+	Provider      provider.Provider
+	Rating        int
+	Title         string
+	TimeStampUnix int64
+	Thumbnail     *bytes.Buffer
+
+	// Not in DB
+	LatestChapter *Chapter
+}