Dell N2000P and Cisco SG300-52

Hi fellow admins, I'm in a bit of a pickle here.

Due to pandemic, my company decided to split people in departments and set up half of them in a separate building. This was a very short notice, but we got the desks and cables up, now I just need to figure out network part. There's no time to order another Dell switch to extend the network to the room, so I picked up some very old Cisco SG300-52 switch from IT storage room.

The problem is, I'm a sysadmin by trade, not a network admin and, equipment wise, I've only ever dealt with Dell switches, but have little to no experience with Cisco (or advanced networking in general).

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We have multiple VLANs, but I'm only interested in using default one for these people. On Dell side we use PVID on each port to determine VLAN, we don't tag packets.

All I want really is to connect all workstations to this switch temporarily and let them work away. I wish we had an unmanaged switch sitting around, but we don't, hence the topic.

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I am trying to do one of 2 possible solutions:

• Set up trunking between both switches (I guess? Or should I use general?). I assume I need to use uplink port on Cisco and any rando port on Dell that is configure for Trunk mode with PVID of my choice? If so, what do I do on Cisco side? No matter what I do, nothing works and STP on Dell side keeps rejecting packages.
• Convert SG300-52 into a dumb (unmanaged) switch. I am reading online that all I need to do is "disable CDP, LLDP and auto smart ports ", is this true? Another topic suggested enabling fastPort on all ports on Cisco switch and that would basically make it unamanged.

Both solutions are very confusing to me, could someone kindly help me out? I am not quite sure what's the easiest way to go about this. It's only temporarily and will not stay in production environment once this madness is over.

Thank you