Bodyweight routines are certainly an option, however be aware that iirc all of the serious bodyweight routines are not "no equipment" routines. The recommendations in the OP are gymnastic routines that require pullup/chinup bars and gymnastic rings as minimum basic equipment. You still need a "space" to workout in that is more than a field.

Bodyweight routines

For a beginner, something like this is reasonable. Of course such a program will max out in fitness gains fairly quickly, even if you start doing several cycles of it. But this isn’t our worry as a beginner. For someone serious about progressing with body weight exercises past this stage, I recommend a program like Overcoming Gravity or Building the Gymnastic Body. There is not really formal support for the efficacy of these programs, but they are endorsed by coaches who train many people successfully, and are consistent with the general principles of weight lifting (progressive overload, training frequency, etc.).