United Nations Ambassador Andrew Young, under fire again for controversial remarks, plans to see President Carter today on his own initiative to give assurance that "I don't want to be treated like a friend" but like any other embassador.

"Speaking to lawmakers and reporters at the Capitol, Young said "it disturbs me" that statements he has made are generating criticism of Carter. He suggested that if the criticism is geginning to hurt Carter, he is willing to step down.

Although Carter and his spokesman have sometimes disagreed publicly with Young - and did so again yesterday - there has been no indication of presidential displeasures at Youngs outspoken ways.

Carter is indebted politically because of his friend's valuable ties to black voters during last year's campaign , but Young said yesterday it "could not be the case that I'm getting off light because of the black vote."

Carter was pictured yesterday as presidential displeasure at Young's disagreeing with Young's characterization in a Playboy interview, of former Presidents Richard Nixon and Gerald Ford as racists. But a spokesman said Carter has rejected a Republican demand that Young apologize or be fired.

Presidential press secretary Jody Powell said, "I think the President feels that those two gentlemen are racists, certainly not in the sense he would use the term." Powell declined to give Carter's definition of "racist."

Republican National Chairman Bill Brock charged that Young's remark about Nixon and Ford "points out the fact that he is a diplomatic incompetent who should be fired." Brock also charged that Young has "generally performed in a manner that almost daily highlights his ineptitude. His behavior as a diplomat is one of the sorriest in the history of our nation."

Asked by Republican senators about the Nixon. Ford remarks, Young told a Senate Foreign Relations subcommittee "I certainly didn't mean anything derogratory about their personal lives" by calling them racists. He added that, "As I use the term, I'm racist. I don't think you can be born in the 20th century and not be contaminated with problems of race."

In the Playboy interview, released for publication over the weekend. Young said Nixon and Ford "were racists not in the aggressive sense but in that they had no understanding of the problems of colored peoples anywhere." Young told the Senate subcommittee that "we need another word for racism."

Asked about conflicts over policy, Young maintained that "I really have had no policy disagreements with the President, the Secretary of State or the National Security Council." He added, though, that maybe his comments are "a little bit ahead" of the carter administration in some areas.

Regarding Cuban troops in Africa, which he has described with less alarm than have other officials, Young volunteered. "I don't think you should have knee-jerk reactions and made Cuba a superpower."

Reporting on his recent 18-nation, 18-day tour of Africa, the U.N. ambassdor said black leaders want a quick transition to majority rule in white-ruled states but are skeptical that U.S. diplomacy can bring it about quickly enough to avert violence.

I think we're under great pressure now to deliver [in Southern Africa] and to maintain the momentum that the first months [of the Carter administration] have produced," said Young.He said an important test would be the outcome of a Western-nations diplomatic mission this week seeking independence for South Africa's Namiblia colony.