When seeing stats, a middle guard relay in a datacenter looks like ok ;)
Some months are needed to have a good consensus score, then some Terabits will be routed every months ;)
Here is a graph since the beginning on this relay...

yearly graph


Not trying to dissuade you from running a bridge, just pointing out that that the bandwidth you want to donate to the Tor network may not be utilized. In contrast, I haven't seen a mature middle node that went unused.

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Petrusko
C0BF 2184 4A77 4A18 90E9 F72C B3CA E665 EBE2 3AE5