To summarize the basic architecture:
Core Lightning node with one channel
– 60,000 sats, connected to your LND node
LND node with two channels
– 60,000 sats, connected to your Core Lightning node (same channel mentioned above)
– 500,000 sats, connected to ACINQ
Of course, you will have more channels besides the ones above, but these are needed for the basic architecture.
That 60,000 sat channel between your two nodes can be opened from either end. You can go into Core Lightning and open the channel up from it to your LND node for 60,000 sats. Or you can go into Ride The Lightning (which we configured to point at your LND node) and open a channel up from it to your Core Lightning node for 60,000 sats. Since I think you mentioned you are able to see your Core Lightning node on 1ML, the second option will probably be the simplest.
That 500,000 sat channel to ACINQ should be opened up from your LND node (using Ride The Lightning), and not from your Core Lightning node.
Once all of the channel open transactions have been mined and there have been enough confirmations so that the channels appear active, then you will open some inbound liquidity on your 500,000 sat channel with ACINQ. This can be done going to Boltz.exchange to do a swap from Lightning to Bitcoin. For the receive address, you typically would use a cold storage address (if you’ve got your hardware wallet set up), otherwise just send it to a software wallet that you own (could even be the wallet on your Lightning node if you prefer)