Aloha currently has 0 seed nodes online, out of 3 total nodes, with an average of about 50 peers online concurrently. The latency on the network is higher than other networks and has an total uptime of 99% since it's inception. This network was found on Github as a fork. The code divergence from from the orignally forked Haveno is moderate and is pending assesment for malware. Based on the network activity, the risk in loss of value engaging with the network is categorised as low. It's important you based your decision on whether to use this network base on your own assement of the metrics.
You can connect by first downloading haveno to your desktop then once it asks for the seednodes, enter at least 1 of the nodes that are listed online from above. Excerise caution, all networks are third party operated and none are endorsed.
Yes, you can but they'll have seperate balances.