The poem begins by addressing an unnamed person: the "your" referred to in line 4. This person, the speaker says, enjoys a particular kind of landscape: one that's tame, pretty, and bucolic. They love "field[s]" and "coppice[s]" (i.e., human-managed woodlands), "green and shaded lanes" of the type one might find in suburban or rural towns, and "ordered woods and gardens" that indicate human control of the environment. Their "love" of such landscapes is instinctive and perhaps inherited: it's "running in [their] veins."
The cozy scenery of this opening stanza is characteristic of the English countryside. (Though England isn't mentioned by name, the poet recalled that "My Country" was inspired by a conversation with a friend after the two had visited the UK.)
Subtle internal rhyme ("love of"/"Of"/"Of") and assonance ("shaded lanes") add pleasing musicality to this description of a pleasant landscape. These lines also establish a meter and rhyme scheme that will make it musical and memorable throughout:
The love | of field | and cop- | pice,
Of green | and sha- | ded lanes,
Each line contains three iambs, or metrical feet consisting of an unstressed followed by a stressed syllable; thus, the poem is set in iambic trimeter. The odd-numbered lines contain an extra unstressed syllable at the end: that is, they have "feminine endings." The even-numbered lines form rhyme pairs (here, "lanes"/"veins"), so that each stanza rhymes ABCBDEFE.
The "Of" that begins lines 2 and 3 (paralleling the "of" in line 1) is the poem's first example of anaphora, or repetition across the beginnings of lines, sentences, etc. The poet will use this device often, both to create rhythmic momentum and to build lists like the catalogue of landscape features in lines 1-3. In a device called asyndeton, the poet omits the conjunction ("and") that would normally fall between lines 2 and 3, preserving the metrical rhythm and making the list more concise.