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I have received a small amount of testnet BTC for testing Lightning Network. I'm using Eclair to figure out how LN works.
How can I create a channel. I guess for testnet, the node are different. I have tried with a main net node which says "Can't create channel".
My balance is ~0.002 BTC. Would appreciate if someone help me to learn the Lightning Network on testnet. Was suggested by BitCryptex to use the testnet.

See if this helps > https://bitcointalk.org/index.php?topic=2833635.0
It is quite a big post but you should get the info you need from there.

I've actually posted a video walktrough for the mainnet on one of my sites:
https://unblur.ninja/walktrough_eclair_android.php

It's for an older version of eclair, and you'll need to find a testnet node to connect to, but the main steps should be more or less the same.

If you have specific questions/problems, don't hesitate to ask!

You're right. You can't connect with a mainnet client to a testnet node and vice-versa. Use the testnet version of 1ml.com (https://1ml.com/testnet) to choose an appropriate node. Once your channel is active, you can try to spend your coins on a coffee (https://starblocks.acinq.co/#/) or an article (https://testnet.yalls.org/).

I think you're overthinking it. I've used it, and this is what I did:
1. Install Eclair Mobile Testnet (https://play.google.com/store/apps/details?id=fr.acinq.eclair.wallet&hl=en) on Android.
2. Click Channels.
3. Click the green + on the bottom-right corner.
4. Open a channel to ACINQ NODE (tick "Request liquidity from this node", this has a fee but it's on Testnet anyway)

If you want to test it, feel free to post a (small) payment request. You'll need to select "Enable receive over Lightning" under Settings first.

It works  :D I have created a channel with ACINQ Node (Had no idea what it is and that's why I didn't try with it.). Successfully created a channel but it says I can receive 0 BTC while I can send the amount I have entered with - Minimum Channel Reserve. I have attached an image below.


Since I can't receive, I would love if you create a payment request and I would test it for the first time. Please make sure the payment request expiration is maximum (is it 6 hours?).

I have already mentioned it in my yesterday's reply to your guide. It's completely normal. You can't receive payments over the LN if you don't spend anything. You can't have more coins in the channel than its initial balance. You have to spend amount matching the channel reserve in order to be able to receive payments. You can read an easier to understand explanation here (https://lightning-wallet.com/using-lightning-wallet#using-lightning-wallet).

That's why I said you should "Request liquidity from this node".

Even easier: order a Blockaccino at Starblocks (https://starblocks.acinq.co/)!

I paid, I did with Lightning Network. It's really an exciting feeling.

https://i.imgur.com/091Y08J.png

I did tick that option; what if I didn't tick that?

Fucking awesome. It was instant, within second. I can't imagine that it can be such faster while with maximum fees we had to wait 10 minutes at least.

A payment request-

https://i.imgur.com/QWV4RJ4.jpg

Let me know if it's enough small, otherwise, I will create another.

I received it successfully, thanks a lot for helping me. Thanks for the suggestion. It was a great experience indeed. Now, I will check it a little more and try with main net with the gambling site you mentioned in other thread.

I've sent 1000 satoshi. For future real use: you shouldn't post your balance :P

You can get 0.01 tBTC here (https://testnet-faucet.mempool.co/), so you can open another channel and get incoming capacity.