V4 is better translated ‘Yahweh your god Yahweh one’. Yahweh probably means something like ‘He who is’. ‘One’ or echad is very emphatic. Not the rather bloodless word ‘only’. It’s fundamental to the Christian understanding of God.
And ‘love’ does not mean warm fuzzy feelings. It means putting God first.
How can I do that in practice?
A problem: did God really want them to exterminate the inhabitants and take over their property?