tidycensus error + SQL pseduocode

Hello!  First time poster, so please be gentle.  I'm relatively new to unaggregated Census data, although have a solid knowledge of R, statistics, and (if dated) survey methods.

I have spend a few hours over the long weekend trying to familiarize myself with tidycensus, PUMS data, and IPUMS/ipumsr.  tidycensus seems as if it should work, but I'm getting an error message: 

Error in curl::curl_fetch_memory(url, handle = handle) : Could not resolve host: api.census.gov

I don't know if it's related; I have tried to approaches to entering my key:

1.

tidycensus::census_api_key(key =  "l0ts0fl3tt3r2andnumb3r2", install = TRUE)

2.

temp <- get_pums(
 variables = c("NRC", "FES", "WGTP"),
 state = "AR",
 survey = "acs1",
 year = 2019,
 rep_weights = "housing",
 key = "l0ts0fl3tt3r2andnumb3r2",
 show_call = TRUE
 )

Ultimately, what I'm really trying to get is best represented by the following SQL pseudocod (although I could recode/rebucket the continuous NRC data):

SELECT NRC, FES, A_WGT_FACTOR -- number of children, adult gender/labor force, an appropriate weighting factor
FROM PUMS_DB -- the appropriate PUMS data source
WHERE SURVEY_YR = '2019'
 AND SURVEY_SOURCE = 'ACS1'
GROUP BY STATE
ORDER BY STATE DESC

Unless I misunderstand, I would have to download, unzip and then upload all the files to a database in order to execute the query above (?).

Any tips, tricks or hints would be most appreciated.  Thanks in advance and regards, T