US Immigration from Dominican Republic

my stepsons recently came to live with us here in New Jersey after nearly two years of waiting. Their mom passed away after a tragic car accident. my husband is a naturalized citizen and I am US born. now that they are here I am curious to know the next steps in them obtaining citizenship. I believe I only need to get their social security numbers and then later apply for a us passport is this correct? I am also curious to know if there is an easy way to change their name legally without paying ridiculous fees. We wish to drop the second last name for simplicity sake, things get so mixed up and complicated with two last names here in the states. my husband did this with his n400 but the boys are taking different route to citizenship. any recommendations appreciated!

Hello everyone, thanks for reading. My husband and I are looking into getting him a tourist visa for 3 months (I think that is the maximum) from Dominican Republic to the US. I take lots of trips there but it is very expensive and hard to be off work for long periods of time. Our i130 was received in June 30 2020 and I haven t heard anything since So what I m asking is will our paperwork be jeopardized if we got him a tourist visa while we wait? I have heard of people trying to beat the system and just come and stay on a tourist visa and never leave. That obviously isn t what we would be doing but I m wondering if they will think that because of our situation? Also if he is able to come on a tourist visa, after the 3 months when he has to leave, are we able to get it renewed or something along that line? Or can he come again after returning to Dominican Republic for a week or so? Anything like that? Also are other people having similar wait times? I m not sure what to expect with the offices being delayed by COVID and this being our first time going through this process. If anyone has any insight on our timing, tourist visa info, or anything related to this please comment I appreciate it greatly!!!